Difference between revisions of "PHP-and-MySQL/C2/Multi-Dimensional-Arrays/English-timed"

|A multidimensional array is an array in which you can store other arrays.

|It is very similar to an associative array.

|For a better understanding, let us start the program.

|I will create a program that lets you see the  position of a letter in the English  

alphabet.

|For example, if I give the value 1, it should echo out "A" in position 1.

|If I give the value two it would say "B" in position 2.  

|And for three, it will say  "C" is in position 3, and so on.

|First I will create my own array.

|And just for easy viewing, I will bring this down.

|And inside. I will create my own array, which I will call ‘ABC’.

|That will be the array.

|And inside these, will be the values, for example, Capital A, B, C and D.

|And these values will be separated by commas.

|And then we type “123” and that is equal to an array.

|Now we’re just going to have ‘1,2,3,4, and that’s it.

|Down here, I’ll show you how to echo out specific data inside the array.

|And then the position of what you want inside the array. So it is an array inside an array.

|So I will just type ‘echo’ and then ‘alpha’ which is our main array.

|And then inside square brackets, ‘ABC’.

|And next, inside square brackets, the position of the element if you want to retrieve.

|So we've made our two basic arrays inside our main arrays, and we’ve learnt to call it.

|Now I’m going to create a new program to find out the position of a letter in relation to its number.

|I’m going to type up here ‘ postion = 0’, since 0 is the beginning.

|Now I will echo out ‘Letter something is in position something’.

|We enter a position here, say 3. Since C is in position 3 in the alphabet, we get C.

|So , to echo out our letter, if I am going to replace the first blank with ‘alpha’.

|ABC

|'pos'

|So then, the position will be - Alpha...  123

|And then the position, ‘pos’.

|Position zero inside the internal array “ABC”. So in actual fact, we are saying that A is in position 0,

|which is this array, 123 and that is position zero. So actually we are saying letter A is in position one.

|Lets run this. Okay. A is in position 1. Let’s change this to 1.

|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.

|So, position one minus one is infact 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.

|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.