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

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Revision as of 16:08, 2 September 2014

Time Narration
00:00 Welcome to the FOREACH loop tutorial.
00:02 This is the last loop I'm going to cover.
00:05 The basic fundamental of this loop is that it will loop through the values of an array
00:10 or the elements of an array
00:13 I remember that in my earlier tutorials I said that the elements of an array are also called id tags
00:21 The elements of an array aren't called id tags
00:24 When you're echoing out an array value
00:29 these here are the id - like numerical id, keys or tags
00:35 So I apologize for that
00:37 However lets get back to our FOREACH loop. Now we'll create an array to start with
00:43 I'm going to call this numbers and its an array. We now have to create these
00:49 I've shown you this in my earlier tutorials and we'll have the numbers 1 2 3 4 5 6 7 8 9 and 10
01:00 Ok. So, a FOREACH is like this
01:03 So we have FOREACH and then we have our condition here . Well I don't know what to call it
01:13 So, let me say the name of the array i.e. numbers
01:21 And then we say as and then we say value. So we can give this any name.
01:27 We could call it anything but I will type value
01:32 And then inside the curly brackets, the fundamental command would be echo value
01:40 And we'll concatenate a line break in the end and lets have a look at this
01:46 So that echoed through our loop. Its a really easy way to echo through our loop. You can use other loops to echo through an array. You have to write it manually, however and this is probably the easiest way to do it.
02:00 So as long as you remember this, you can echo through your array, perform operations on each part of your array and then maybe store it in a new array
02:08 However I'm going to show you how to manipulate in a simple way
02:12 Now what I'll do is - I'm going to do the 2 times table.
02:19 So I'll scrap this and I'll say the following.
02:23 So I need the number in the array here times 2 is and then outside of this is going to be the new value. So we're going to times each element of the array - each number in the array by 2
02:41 Let's start out by saying numbers
02:46 Sorry, we're going to say value because we have stored each FOREACH element in this variable name value
02:56 So value is each of these in turn through the loop
03:00 Therefore, value times 2 is, and then after this we'll put some brackets. Inside we'll type value times 2
03:10 Remember this is a mathematical operator - an arithmetical operator that I showed you earlier
03:15 It is a mathematical operator but the correct name is arithmetic
03:20 OK. This is going to multiply by two
03:24 Now to make this interesting what I'll do is to make this as a multiple
03:30 as a new variable
03:32 and the multiple up here
03:35 is going to equal 2. So you can guess by now that I've basically replaced that
03:41 I can change this as I please
03:43 Lets load this and refresh
03:46 Oh! We forgot the break
03:48 So, lets just add that in the end here
03:51 Well as we can't read it
03:54 Sorry, 1 times 2 is 2
03:58 2 times 2 is 4 all the way up to 10 times 2 is 20
04:03 We know that these are all correct
04:05 We can change this, lets say we want the 10 times table
04:10 refresh, 1 times 2 is... Oh! nah, we forgot to change this 2 into multiple
04:20 Now it will echo our number
04:23 Refresh
04:24 So 1 times 10 is 10, 2 times 2 is, 2 times 10 is 20, 10 times 10 is a hundred
04:30 So as long as we change the value of the multiple - lets say the 12 times table
04:36 Our 2 values are going to change
04:39 There we are.
04:41 So from this FOREACH loop and array I've created a really basic, multiple program with which you can see the times table for any set of numbers you like
04:51 So that's the FOREACH loop. Thanks for watching.
04:54 This is Madhur dubbing for the Spoken Tutorial Project.

Contributors and Content Editors

Gaurav, Minal, PoojaMoolya, Pratik kamble, Sandhya.np14