Difference between revisions of "PHP-and-MySQL/C2/Switch-Statement/English-timed"

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Revision as of 11:04, 10 July 2014

Time Narration
00:00 Hello and welcome to this PHP tutorial on the SWITCH statement.
00:06 I'm going to show you a new exercise on this because its an important feature of PHP
O0:13 Let's create the syntax quickly
00:16 The SWITCH statement is a substitute for the IF statement. Its a lot more neater and formattable choice although the input is an expression.
00:29 So, now let's input the value of something and then let's save the value equal to this
00:36 Then we can execute the code if it equals or matches this value
00:43 It's not a comparing technique. So, for comparing an IF statement for matching values and outputs that depend on the input, we're going to say SWITCH
00:55 Let's start
00:57 SWITCH is the basic code for it
01:00 Let's put an expression in here, for example, I will say Alex here
01:09 Let's create a mini program and I will explain it as we go
01:15 Just like the IFstatement we will put curly brackets here
01:21 Now let's look at the way to call each sort of check
01:26 We want to check the value here
01:29 Now we will put this in quotation marks
01:32 You can't even number obviously
01:35 So what we type is - case - the value of the case that we want to match. For example- Alex
01:44 Then we type a colon or a semi colon
01:48 And then the condition if the case has matched with the SWITCH expression you have picked
01:56 So, I will type - echo you have blue eyes
02:05 To end our case comparison we're going to use break and a semi colon
02:11 Remember that we've used the semi colon here but not here
02:18 Now the second case. Lets see how to do it
02:23 I'll type Billy and echo you have brown eyes
02:30 Okay, and then break and semi-colon
02:36 This is like an integrated IF. That is I could say - IF your name is Alex then echo you have blue eyes or ELSE IF your name is Billy you have brown eyes
02:53 Probably for some people it's easy to do it this way. It's a lot more readable but it's a matter of choice
03:02 Okay we got no more cases, I'm just going to use Alex and Billy for this example
03:10 Here I will say default which will echo out - I don't know what color your eyes are
03:19 Okay, we don't need a break after this because there are no more cases
03:26 Obviously, there's no break after it cause there are no more options to chose from
03:34 Okay, so, we've got our SWITCH here. Let's give it a go
03:39 Now I'm going to replace this ALEX here with a variable, to build our program
03:46 So I'll type name equals, and I will let you decide that
03:53 Then I'll say name, here
03:57 So you see this is how we incorporate a variable here
04:01 You should know how to do that by now
04:04 So, let's start and see how this will work
04:08 You'll say switch, you'll take this expression, which is equal to Alex
04:13 Basically, this is the case which equals to Alex and it'll echo this. The break is to end it
04:22 If the name is say, Rahul, the default will echo - I don't know what colour your eyes are
04:29 Okay, so let's try running this
04:37 Just to revise
04:39 We can see that Alex matches to Alex matches to the output
04:44 What you can do is you can enter as many lines of code here as you like. This break determines where the case ends
04:54 An IF statement needs curly brackets to end a block
04:59 However, here break determines the end of the block. These are called blocks, by the way.
05:06 So, let's change this to Billy and let's see what happens
05:10 You have brown eyes - exactly what we determined here
05:16 Okay, now I'll change this to Kyle.....and refresh, I don't know what colour your eyes are, because there is no block that states Kyle's eye colour in our program feature
05:31 So, that's basically the SWITCH statement
05:34 Try it out. Some people don't like using it, some prefer using it
05:38 It's probably much faster than the IF statement. It's easier to control. It looks a lot better. So really its up to your personal choice
05:48 Thanks for watching. This is Arvind for the Spoken Tutorial Project, signing off. Goodbye.

Contributors and Content Editors

Minal, PoojaMoolya, Pratik kamble, Sandhya.np14