PHP-and-MySQL/C2/Multi-Dimensional-Arrays/English-timed

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Time Narration
00:00 A multidimensional array is an array in which you can store other arrays.
00:06 It is very similar to an associative array.
00:09 However, the associates for this array are arrays themselves.
00:14 For a better understanding, let us start the program.
00:19 I will create a program that lets you see the position of a letter in the English alphabet.
00:26 For example, if I give the value 1, it should echo out "A" in position 1.
00:33 If I give the value two, it would say "B" in position 2.
00:38 And for three, it will say "C" is in position 3 and so on.
00:43 First, I will create my own array.
00:53 And just for easy viewing, I will bring this down.
00:58 You are quite welcome to do so yourself.
01:01 And inside, I will create my own array which I will call ‘ABC’.
01:10 That will be the array.
01:15 Instead of putting a value here, as we did before, we have an array inside.
01:24 And inside these, will be the values. For example, Capital A, B, C and D.
01:32 And these values will be separated by commas.
01:41 And then we type “123” and that is equal to an array.
01:46 Now we’re just going to have 1,2,3,4, and that’s it.
01:53 Down here, I’ll show you how to echo out specific data inside the array.
01:59 We’ll call our main array.
02:02 And we’ll call this array as well.
02:05 And then the position of what you want inside the array. So, it is an array inside an array.
02:13 So, I will just type echo and then alpha which is our main array.
02:19 And then inside square brackets, ABC.
02:23 And next, inside square brackets, the position of the element, if you want to retrieve.
02:30 Now, for example, is going to echo "A".
02:35 Let us give that a run - and we got "A".
02:47 Changing this to ‘123’, will hopefully give us "1".
02:54 As you can see here.
02:57 So we've made our two basic arrays inside our main arrays, and we’ve learnt to call it.
03:05 Now I’m going to create a new program to find out the position of a letter, in relation to its number.
03:13 I’m going to type up here postion = 0, since 0 is the beginning.
03:30 Now I will echo out Letter something is in position something.
03:39 This is going to be quite simple.
03:42 We enter a position here, say 3. Since "C" is in position 3 in the alphabet, we get C.
03:53 So , to echo out our letter, if I am going to replace the first blank with ‘alpha’.
04:02 ABC
04:05 'pos'
04:07 as 'pos' represents our position.
04:11 So then, the position will be - Alpha... 123
04:19 And then the position, ‘pos’.
04:23 At the moment, position is equal to 0.
04:29 We type ’echo something’. So this is position zero.
04:36 Position zero inside the internal array “ABC”. So in actual fact, we are saying that "A" is in position 0
04:47 which is this array 123 and that is position zero. So, actually we are saying letter "A" is in position one.
04:56 Let's run this. Okay. "A" is in position 1. Let’s change this to 1.
05:05 Refresh. Letter "B" is in position 2. Now what I will do to make this application fully functional and easy to navigate is, eliminate the necessity to write zero for 1.
05:21 So I will put ‘-1’ at the end and put 1 in brackets for better legibility.
05:28 So, position one minus one is in fact zero. So, writing 1 will give the same result as writing 0. Writing 2 will give us the same result as writing 1...letter "B" is in position 2.
05:43 If I put 1 then we get "A" is in position 1. So if I put zero here, there is no position -1; so we get “letter in position”. So we don’t have the letter or the position.
06:01 So, I’ve made that a bit more user-friendly. Thanks for watching!

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