PHP-and-MySQL/C2/Logical-Operators/English-timed - Revision history

Sandhya.np14 at 15:32, 19 December 2018

2018-12-19T15:32:54Z

Sandhya.np14 at 15:16, 15 December 2018

2018-12-15T15:16:41Z

Sandhya.np14 at 05:03, 20 May 2015

2015-05-20T05:03:44Z

Sandhya.np14 at 05:00, 20 May 2015

2015-05-20T05:00:36Z

Sandhya.np14 at 18:26, 19 May 2015

2015-05-19T18:26:11Z

Sandhya.np14 at 17:13, 19 May 2015

2015-05-19T17:13:38Z

Gaurav at 09:32, 2 September 2014

2014-09-02T09:32:34Z

Pratik kamble at 05:39, 10 July 2014

2014-07-10T05:39:34Z

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Minal: Created page with '{| border=1 !Time !Narration |- |00:00 |Hello and welcome to a tutorial on "Logical Operators". Its a very brief tutorial but I will keep it like that at the moment. |- |0:09 |I…'

2013-01-02T10:22:35Z

Created page with '{| border=1 !Time !Narration |- |00:00 |Hello and welcome to a tutorial on "Logical Operators". Its a very brief tutorial but I will keep it like that at the moment. |- |0:09 |I…'

New page

{| border=1
!Time
!Narration
|-
|00:00
|Hello and welcome to a tutorial on "Logical Operators". Its a very brief tutorial but I will keep it like that at the moment.
|-
|0:09
|I'll use an example of an "if" statement again because that's all I have got at the moment.
|-
|0:18
|What is a logical operator? Let's add a bit of logic and say its the 'and' or the horizontal line operator.
|-
|0:27
|Now if I start creating my basic layout for my "if" statement i will get to work on showing you what you can do with these.
|-
|0:43
|Before we had example such as 1 is greater than 1 which at the moment is going to return 'false'
|-
|0:54
|let's just check it to see where we are.... right . So that's "false".
|-
|1:04
|Now what if I said "if 1 is greater than 1 or equals 1".
|-
|1:18
|Now we don't write it as 'or' we write it as two horizontal lines or two pipes.
|-
|1:26
|Not quiet sure about that but if you know my keyboard it will be next to the shift key - two vertical line that means 'or'.
|-
|1:38
|So if we compile this what do you think the result is gonna be?
|-
|1:43
|Now let's run through this once - if 1 is greater than 1 - "false" and so we have written "false" or 1 is equal to 1...
|-
|1:54
|We know that 1 equals to 1 is "true" so here we are saying 'or' 1 is equal to 1 not 'and' because we said 'and' then both would have to be "true".
|-
|2:09
|or either of these could be "true" to make this.
|-
|2:12
|The output. So hopefully we get "true".
|-
|2:16
|Okay so that's the 'or'.
|-
|2:18
|Basically it allows you to take two comparisons, show them in your "if" statement and if either of them are "true" - then its like an "either" operator...
|-
|2:30
|"either" of them are "true", you will be left with "true".
|-
|2:34
|"and" operator is a different manner.
|-
|2:39
|"and" requires both of these to be "true" for this to be executed.
|-
|2:46
|So we have got "false" here because 1 is not greater than 1.
|-
|2:51
|We'll go back to our comparison operators and we will say "if 1 is greater than 1 or equal to 1 'and' 1 equal 1", here we will get "true".
|-
|3:04
|So now, all I can really think is about to add a few variables in to this test.
|-
|3:10
|But I am pretty sure that you have got the hang of variables by now, by following my other tutorials.
|-
|3:17
|So these are the two logical operators.
|-
|3:20
|You will find them very useful because you might want to say for example - this is a very classic example. You'll find it in one of my projects....
|-
|3:30
|It is a "login" form. Say a user wants to login into a website.
|-
|3:35
|You've probably logged into a website before and it said to enter your "username" and "password". Now the keywords are in here.
|-
|3:43
|We need to check if the users have entered the "username" and the "password".
|-
|3:48
|If they haven't, there is no point in comparing the "username" to the "password".
|-
|3:52
|So we can say, for example.
|-
|3:54
|If the username in fact let's do this. I'll say "username" is equal to "alex" and my password is equal to "abc".
|-
|4:04
|Now I will substitute these. I can say "username" and "password".
|-
|4:11
|At the moment, this will say "true".
|-
|4:15
|I'll change this. I'll say 'ok' or 'you forgot to fill out a field' because there will eventually be HTML fields.
|-
|4:27
|This is going to be okay because we have got both values.
|-
|4:32
|So let's try it. Yes, that's saying "ok".
|-
|4:37
|Now what happens if I forget to type my password in there? There's nothing in there at the moment - no space - lets get rid of that.
|-
|4:48
|'You forgot to fill out a field'.
|-
|4:50
|So if you imagine these are coming from the user - so it has been submitted as you typed your "username" and "password" in.
|-
|5:00
|We are saying "username" and "password"; basically "username" itself is "true" because it exists...
|-
|5:07
|If you had that inside, that would be acceptable; that would be "true".
|-
|5:14
|We'll just check that there you go.
|-
|5:18
|So because we have got "username" and "password" then that's fine.
|-
|5:23
|But for the 'or' that doesn't really makes sense and you can imagine what will happen.
|-
|5:29
|So right now, this will equal "true" because we have got both values. So this is 'ok'.
|-
|5:36
|Now if I go with both of them and try it out.
|-
|5:41
|"if the username exists" so the username is "true"...
|-
|5:45
|At the moment there is no value - so it is "false".
|-
|5:48
|"or the password is true" - that is, the value exists; at the moment it doesn't, so it is "false".
|-
|5:56
|So we are going to say "You forgot to fill out a field".
|-
|6:00
|I'll just write here nothing because at the moment it means nothing.
|-
|6:05
|So refresh I'll make it nothing.
|-
|6:08
|So you see, already I have explained how useful these can be in so many every day php applications.
|-
|6:17
|For example - a form someone can fill in. You will find many other users for it.
|-
|6:22
|But that's it then.
|-
|6:24
|Two operators that are logical operators.
|-
|6:27
|Just try them out and see what all you can do with them.
|-
|6:31
|I will be using these most definitely in one of my projects quite soon.
|-
|6:35
|Thanks for watching.
|-
|6:37
|This is Sidharth dubbing for the Spoken Tutorial project.

@@ Line 49: / Line 49: @@
 |-
 |02:18
-|Basically it allows you to take two comparisons, show them in your '''if''' statement and if either of them is "true" - then it's like an "either" operator...
+|Basically it allows you to take two comparisons, show them in your '''if''' statement and if either of them is "true" - then it's like an either operator...
 |-
 |02:30
-|"either" of them are "true", you will be left with "true".
+|either of them are "true", you will be left with "true".
 |-
 |02:34

@@ Line 19: / Line 19: @@
 |-
 |00:54
-|let's just check it to see where we are.... right!. So that's "False".
+|Let's just check it to see where we are.... right!. So that's "False".
 |-
 |01:04
@@ Line 25: / Line 25: @@
 |-
 |01:18
-|Now we don't write it as 'or', we write it as two vertical lines or two pipes.
+|Now we don't write it as 'OR', we write it as two vertical lines or two pipes.
 |-
 |01:26
@@ Line 34: / Line 34: @@
 |-
 |01:43
-|Now let's run through this once - if 1 is greater than 1 - "false" and so we have written "false" or 1 is equal to 1...
+|Now let's run through this once - '''if 1 is greater than 1''' - "false" and so we have written "false" or 1 is equal to 1...
 |-
 |01:54
-|We know that 1 equals to 1 is "true". So, here we are saying '''OR''' 1 is equal to 1, not '''AND'''; because if we said '''AND''' then both would have to be "true".
+|We know that '''1 equals to 1''' is "true". So, here we are saying '''OR''' 1 is equal to 1, not '''AND'''; because if we said '''AND''' then both would have to be "true".
 |-
 |02:09
@@ Line 49: / Line 49: @@
 |-
 |02:18
-|Basically it allows you to take two comparisons, show them in your '''if''' statement and if either of them are "true" - then it's like an "either" operator...
+|Basically it allows you to take two comparisons, show them in your '''if''' statement and if either of them is "true" - then it's like an "either" operator...
 |-
 |02:30
@@ Line 55: / Line 55: @@
 |-
 |02:34
-|'''AND''' operator is a different manner.
+|''''AND' operator''' is a different manner.
 |-
 |02:39
@@ Line 73: / Line 73: @@
 |-
 |03:17
-|So these are the two '''logical operators'''.
+|So, these are the two '''logical operators'''.
 |-
 |03:20
-|You will find them very useful because you might want to say, for example:  this is a very classic example; you'll find it in one of my projects.
+|You will find them very useful because you might want to say, for example, this is a very classic example; you'll find it in one of my projects.
 |-
 |03:30
-|It is a "login" form.  Say, a user wants to 'login' into a website.
+|It is a "login" '''form'''.  Say, a user wants to 'login' into a website.
 |-
 |03:35
@@ Line 91: / Line 91: @@
 |-
 |03:52
-|So we can say, for example:
+|So, we can say, for example:
 |-
 |03:54

@@ Line 133: / Line 133: @@
 |-
 |05:23
-|But for the 'OR' (||) that doesn't really make sense and you can imagine what will happen.
+|But for the 'OR' that doesn't really make sense and you can imagine what will happen.
 |-
 |05:29

@@ Line 10: / Line 10: @@
 |-
 |00:18
-|What is a '''logical operator'''? Let's add a bit of logic and say it's the 'and' or the horizontal line operator.
+|What is a '''logical operator'''? Let's add a bit of logic and say it's the '''AND''' or the '''OR''' operator.
 |-
 |00:27
-|Now if I start creating my basic layout for my "if" statement, I will get to work on showing you what you can do with these.
+|Now, if I start creating my basic layout for my '''if''' statement, I will get to work on showing you what you can do with these.
 |-
 |00:43
-|Before we had example such as '1 is greater than 1' which at the moment is going to return 'false'
+|Before we had example such as '1 is greater than 1' which at the moment is going to return '''False'''
 |-
 |00:54
-|let's just check it to see where we are.... right . So that's "false".
+|let's just check it to see where we are.... right!. So that's "False".
 |-
 |01:04
-|Now what if I said "if 1 is greater than 1 or equals 1".
+|Now, what if I said "if 1 is greater than 1 or equals 1".
 |-
 |01:18
-|Now we don't write it as 'or' we write it as two horizontal lines or two pipes.
+|Now we don't write it as 'or', we write it as two vertical lines or two pipes.
 |-
 |01:26
@@ Line 31: / Line 31: @@
 |-
 |01:38
-|So if we compile this, what do you think the result is gonna be?
+|So, if we compile this, what do you think the result is gonna be?
 |-
 |01:43
@@ Line 37: / Line 37: @@
 |-
 |01:54
-|We know that 1 equals to 1 is "true"; so here we are saying '''or''' 1 is equal to 1 not '''and''' because if we said '''and''' then both would have to be "true"
+|We know that 1 equals to 1 is "true". So, here we are saying '''OR''' 1 is equal to 1, not '''AND'''; because if we said '''AND''' then both would have to be "true".
 |-
 |02:09
-|or either of these could be "true" to make this.
+| '''OR''', either of these could be "true" to make this.
 |-
 |02:12
@@ Line 46: / Line 46: @@
 |-
 |02:16
-|Okay, so that's the 'OR'.
+|Okay, so that's the '''OR'''.
 |-
 |02:18
@@ Line 61: / Line 61: @@
 |-
 |02:46
-|So we have got "false" here because 1 is not greater than 1.
+|So, we have got "false" here because 1 is not greater than 1.
 |-
 |02:51
-|We'll go back to our comparison operators and we will say "if 1 is greater than 1 or equal to 1 '''and''' 1 equal 1", here we will get "true".
+|We'll go back to our comparison operators and we will say "if 1 is greater than 1 or equal to 1 '''AND''' (&&) 1 equal 1", here we will get "true".
 |-
 |03:04
@@ Line 70: / Line 70: @@
 |-
 |03:10
-|But I am pretty sure that you have got the hang of variables by now, by following my other tutorials.
+|But I am pretty sure that you have got the hang of variables by now by following my other tutorials.
 |-
 |03:17
@@ Line 76: / Line 76: @@
 |-
 |03:20
-|You will find them very useful because you might want to say for example - this is a very classic example. You'll find it in one of my projects.
+|You will find them very useful because you might want to say, for example:  this is a very classic example; you'll find it in one of my projects.
 |-
 |03:30
@@ Line 94: / Line 94: @@
 |-
 |03:54
-|If the username, in fact let's do this, I'll say "username" is equal to "alex" and my password is equal to "abc".
+|If the username, in fact let's do this, I'll say '$username' is equal to "alex" and my '$password' is equal to "abc".
 |-
 |04:04
-|Now I will substitute these. I can say "username" and "password".
+|Now, I will substitute these. I can say "username" '''AND''' (&&) "password".
 |-
 |04:11
-|At the moment, this will say "true".
+|At the moment, this will say "True".
 |-
 |04:15
-|I'll change this.  I'll say 'ok' or 'you forgot to fill out a field' because there will eventually be '''HTML fields'''.
+|I'll change this.  I'll say "OK" or "you forgot to fill out a field" because there will eventually be '''HTML fields'''.
 |-
 |04:27
@@ Line 109: / Line 109: @@
 |-
 |04:32
-|So let's try it. Yes, that's saying "ok".
+|So, let's try it. Yes, that's saying "OK".
 |-
 |04:37
-|Now what happens if I forget to type my password in there? There's nothing in there at the moment - no space - lets get rid of that.
+|Now what happens if I forget to type my password in there? There's nothing in there at the moment - no space - let's get rid of that.
 |-
 |04:48
-|'You forgot to fill out a field'.
+|"You forgot to fill out a field".
 |-
 |04:50
-|So if you imagine these are coming from the user - so it has been submitted as you typed your "username" and "password" in.
+|So, if you imagine these are coming from the user - so it has been submitted as you typed your "username" and "password" in.
 |-
 |05:00
@@ Line 133: / Line 133: @@
 |-
 |05:23
-|But for the 'or' that doesn't really makes sense and you can imagine what will happen.
+|But for the 'OR' (||) that doesn't really make sense and you can imagine what will happen.
 |-
 |05:29
-|So right now, this will equal "true" because we have got both values.  So this is 'ok'.
+|So right now, this will equal "true" because we have got both values.  So this is "OK".
 |-
 |05:36
-|Now if I go with both of them and try it out.
+|Now, if I go with both of them and try it out.
 |-
 |05:41
-|"if the username exists" so the username is "true"...
+|If the username exists, so the username is "True"...
 |-
 |05:45
-|At the moment there is no value - so it is "false".
+|At the moment there is no value - so it is "False".
 |-
 |05:48
-|"or the password is true" - that is, the value exists; at the moment it doesn't, so it is "false".
+|or the password is true - that is the value exists, at the moment it doesn't, so it is "False".
 |-
 |05:56
-|So we are going to say  "You forgot to fill out a field".
+|So, we are going to say  "You forgot to fill out a field".
 |-
 |06:00
-|I'll just write here nothing because at the moment it means nothing.
+|I'll just write here "Nothing" because at the moment it means nothing.
 |-
 |06:05
-|So '''refresh'''. I'll make it nothing.
+|So '''refresh'''. I'll make it "Nothing".
 |-
 |06:08

@@ Line 37: / Line 37: @@
 |-
 |01:54
-|We know that 1 equals to 1 is "true"; so here we are saying 'or' 1 is equal to 1 not 'and' because if we said 'and' then both would have to be "true".
+|We know that 1 equals to 1 is "true"; so here we are saying '''or''' 1 is equal to 1 not '''and''' because if we said '''and''' then both would have to be "true"
 |-
 |02:09
@@ Line 46: / Line 46: @@
 |-
 |02:16
-|Okay so that's the 'OR'.
+|Okay, so that's the 'OR'.
 |-
 |02:18
-|Basically it allows you to take two comparisons, show them in your "if" statement and if either of them are "true" - then it's like an "either" operator...
+|Basically it allows you to take two comparisons, show them in your '''if''' statement and if either of them are "true" - then it's like an "either" operator...
 |-
 |02:30
@@ Line 55: / Line 55: @@
 |-
 |02:34
-|"AND" operator is a different manner.
+|'''AND''' operator is a different manner.
 |-
 |02:39
-|"and" requires both of these to be "true" for this to be executed.
+|'''AND''' requires both of these to be "true" for this to be executed.
 |-
 |02:46
@@ Line 64: / Line 64: @@
 |-
 |02:51
-|We'll go back to our comparison operators and we will say "if 1 is greater than 1 or equal to 1 'and' 1 equal 1", here we will get "true".
+|We'll go back to our comparison operators and we will say "if 1 is greater than 1 or equal to 1 '''and''' 1 equal 1", here we will get "true".
 |-
 |03:04
@@ Line 73: / Line 73: @@
 |-
 |03:17
-|So these are the two logical operators.
+|So these are the two '''logical operators'''.
 |-
 |03:20
-|You will find them very useful because you might want to say for example - this is a very classic example. You'll find it in one of my projects....
+|You will find them very useful because you might want to say for example - this is a very classic example. You'll find it in one of my projects.
 |-
 |03:30
-|It is a "login" form.  Say a user wants to login into a website.
+|It is a "login" form.  Say, a user wants to 'login' into a website.
 |-
 |03:35
@@ Line 91: / Line 91: @@
 |-
 |03:52
-|So we can say, for example.
+|So we can say, for example:
 |-
 |03:54
-|If the username in fact let's do this. I'll say "username" is equal to "alex" and my password is equal to "abc".
+|If the username, in fact let's do this, I'll say "username" is equal to "alex" and my password is equal to "abc".
 |-
 |04:04
@@ Line 103: / Line 103: @@
 |-
 |04:15
-|I'll change this.  I'll say 'ok' or 'you forgot to fill out a field' because there will eventually be HTML fields.
+|I'll change this.  I'll say 'ok' or 'you forgot to fill out a field' because there will eventually be '''HTML fields'''.
 |-
 |04:27
@@ Line 127: / Line 127: @@
 |-
 |05:14
-|We'll just check that there you go.
+|We'll just check that, there you go.
 |-
 |05:18
-|So because we have got "username" and "password" then that's fine.
+|So, because we have got "username" and "password" then that's fine.
 |-
 |05:23
@@ Line 157: / Line 157: @@
 |-
 |06:05
-|So refresh I'll make it nothing.
+|So '''refresh'''. I'll make it nothing.
 |-
 |06:08
-|So you see, already I have explained how useful these can be in so many every day php applications.
+|So you see, already I have explained how useful these can be in so many every day '''php applications'''.
 |-
 |06:17
@@ Line 169: / Line 169: @@
 |-
 |06:24
-|Two operators that are logical operators.
+|Two operators that are '''logical operators'''.
 |-
 |06:27
@@ Line 181: / Line 181: @@
 |-
 |06:37
-|This is Sidharth dubbing for the Spoken Tutorial project.
+|This is Sidharth, dubbing for the Spoken Tutorial project.

@@ Line 4: / Line 4: @@
 |-
 |00:00
-|Hello and welcome to a tutorial on "Logical Operators".  Its a very brief tutorial but I will keep it like that at the moment.
+|Hello and welcome to a tutorial on '''Logical Operators'''.  It's a very brief tutorial but I will keep it like that at the moment.
 |-
 |00:09
@@ Line 10: / Line 10: @@
 |-
 |00:18
-|What is a logical operator? Let's add a bit of logic and say its the 'and' or the horizontal line operator.
+|What is a '''logical operator'''? Let's add a bit of logic and say it's the 'and' or the horizontal line operator.
 |-
 |00:27
-|Now if I start creating my basic layout for my "if" statement i will get to work on showing you what you can do with these.
+|Now if I start creating my basic layout for my "if" statement, I will get to work on showing you what you can do with these.
 |-
 |00:43
-|Before we had example such as 1 is greater than 1 which at the moment is going to return 'false'
+|Before we had example such as '1 is greater than 1' which at the moment is going to return 'false'
 |-
 |00:54
@@ Line 28: / Line 28: @@
 |-
 |01:26
-|Not quiet sure about that but if you know my keyboard it will be next to the shift key - two vertical line that means 'or'.
+|Not quite sure about that but if you know my keyboard it will be next to the shift key - two vertical lines that means 'OR'.
 |-
 |01:38
-|So if we compile this what do you think the result is gonna be?
+|So if we compile this, what do you think the result is gonna be?
 |-
 |01:43
@@ Line 37: / Line 37: @@
 |-
 |01:54
-|We know that 1 equals to 1 is "true" so here we are saying 'or' 1 is equal to 1 not 'and' because we said 'and' then both would have to be "true".
+|We know that 1 equals to 1 is "true"; so here we are saying 'or' 1 is equal to 1 not 'and' because if we said 'and' then both would have to be "true".
 |-
 |02:09
@@ Line 46: / Line 46: @@
 |-
 |02:16
-|Okay so that's the 'or'.
+|Okay so that's the 'OR'.
 |-
 |02:18
-|Basically it allows you to take two comparisons, show them in your "if" statement and if either of them are "true" - then its like an "either" operator...
+|Basically it allows you to take two comparisons, show them in your "if" statement and if either of them are "true" - then it's like an "either" operator...
 |-
 |02:30
@@ Line 55: / Line 55: @@
 |-
 |02:34
-|"and" operator is a different manner.
+|"AND" operator is a different manner.
 |-
 |02:39

@@ Line 1: / Line 1: @@
 {| border=1
-!Time
+|'''Time'''
-!Narration
+|'''Narration'''
 |-
 |00:00