PHP-and-MySQL/C2/Comparison-Operators/English-timed
From Script | Spoken-Tutorial
Revision as of 21:52, 19 May 2015 by Sandhya.np14 (Talk | contribs)
| Time | Narration |
| 00:00 | In this PHP tutorial, we will learn about Comparison Operators. |
| 00:05 | Comparison operators can compare 2 values, 2 strings or 2 variables that can contain any of them and will act upon that. |
| 00:15 | For this, I am going to use an if statement. |
| 00:19 | Let's start by creating the if statement structure. |
| 00:25 | My condition is if 1==1, |
| 00:30 | echo |
| 00:33 | "True" |
| 00:37 | and then else |
| 00:42 | echo |
| 00:44 | "False". Remember, I don't need these brackets; so I'm going to take them out. |
| 00:51 | Let's indent it. |
| 00:56 | Never mind the indenting. |
| 00:59 | This is the first comparison operator. |
| 01:02 | Two 'equals to' (==) means the 'comparison operator'. We've seen this in the if statement before. |
| 01:08 | 1 does equal to 1; so this will echo "True". Let's try it. |
| 01:13 | We got "True". |
| 01:15 | Let me change this. if 1 is greater than 1 (1>1) then let's see what result we get. |
| 01:27 | "False", because 1 is equal to 1 and not greater than 1. |
| 01:33 | Now let's change this to 1 greater than or equal to 1 (1>=1). |
| 01:37 | if 1 greater than or equal to 1, echo "True" else echo "False". |
| 01:45 | Here, we should get "True". |
| 01:48 | You can also do the same with 'less than or equal to'. So, for example: less than (<) |
| 01:55 | would be "False", less than or equal to (<=) would be "True". |
| 02:01 | We can also say 'not equal'. So, if 1 is not equal to 1 (1!=1) echo "True". |
| 02:11 | Refresh. We'll get "False" here because 1 is equal to 1. Now let's say if 1 isn't equal to 2 (1!=2). |
| 02:20 | We get "True" because 1 is not equal to 2. |
| 02:25 | These are the basic comparison operators that you will be using for our tutorials. |
| 02:33 | Expand on this - practice them - and you'll understand them better. |
| 02:40 | You can also compare variables using these operators. So for example: num1 = 1, |
| 02:48 | num2 = 2. All we now do is, replace these values and there we go. |
| 03:01 | This will produce exactly the same result as we've got earlier which is "True". Now all we need to do is, change these values. |
| 03:11 | Please note, this will now read as num1 = 1, num2 = 1. So if 'num1' doesn't equal 1 it is "False" because 1 does equal 1 therefore we get "False". |
| 03:24 | These here are the simple comparison operators. Play around with them. See what you can do. Thanks for watching. |
| 03:33 | This is Mad Madhur, dubbing for the Spoken Tutorial Project. |
