[SOLVED] for loop within a for loop please help cheers

[redarrow]

hi there advance thank you i am trying to understand a loop within a loop

can any one exsplain the behavour of the following example cheers.

 

ps. i am not wasting your time i am currently brushing up on php.

 

if you would like to you can post your example for me to understand the concept cheers.

 

<?php

for($a=0; $a<4; $a++){

for($b=0; $b<3; $b++){

	for($c=0; $c<2; $c++){

		echo" a: loop $a <br> b: loop $b <br>  c: loop $c <br>";	
	}
}
}
?>

 

result

a: loop  <br> b: loop 0 <br>  c: loop 0 <br> a: loop  <br> b: loop 0 <br>  c: loop 1 <br> a: loop  <br> b: loop 1 <br>  c: loop 0 <br> a: loop  <br> b: loop 1 <br>  c: loop 1 <br> a: loop  <br> b: loop 2 <br>  c: loop 0 <br> a: loop  <br> b: loop 2 <br>  c: loop 1 <br> a: loop  <br> b: loop 0 <br>  c: loop 0 <br> a: loop  <br> b: loop 0 <br>  c: loop 1 <br> a: loop  <br> b: loop 1 <br>  c: loop 0 <br> a: loop  <br> b: loop 1 <br>  c: loop 1 <br> a: loop  <br> b: loop 2 <br>  c: loop 0 <br> a: loop  <br> b: loop 2 <br>  c: loop 1 <br> a: loop  <br> b: loop 0 <br>  c: loop 0 <br> a: loop  <br> b: loop 0 <br>  c: loop 1 <br> a: loop  <br> b: loop 1 <br>  c: loop 0 <br> a: loop  <br> b: loop 1 <br>  c: loop 1 <br> a: loop  <br> b: loop 2 <br>  c: loop 0 <br> a: loop  <br> b: loop 2 <br>  c: loop 1 <br> a: loop  <br> b: loop 0 <br>  c: loop 0 <br> a: loop  <br> b: loop 0 <br>  c: loop 1 <br> a: loop  <br> b: loop 1 <br>  c: loop 0 <br> a: loop  <br> b: loop 1 <br>  c: loop 1 <br> a: loop  <br> b: loop 2 <br>  c: loop 0 <br> a: loop  <br> b: loop 2 <br>  c: loop 1 <br>

[per1os]

<?php
//while a is less than 4 do this and increment a
for($a=0; $a<4; $a++){
// while b is less than 3, increment b and do this
for($b=0; $b<3; $b++){
	// while c is less than 2, increment c and do this.
	for($c=0; $c<2; $c++){
	            // print out a: loop num b: loop num c: loop num
		echo" a: loop $a <br> b: loop $b <br>  c: loop $c <br>";	
	}
}
}
?>

 

Ok so anytime c loop is hit that message is displayed. Since the C for loop is inside the b for loop anytime b is ran through that message gets displayed twice. Since the b loop is inside the a loop anytime the a loop is ran the b loop runs 3 times which in turn runs the c loop 3 times 2 (6 times). So all in all the loop should run (4 * 3 * 2) which is 24 times. You should get 24 messages displays to your screene. Essentially.

 

Hope that helps and hope I didn't mis-interpret what is going on.

[redarrow]

Thanks frost for your help and example, that  what i needed cheers mate thank you for your time.

[redarrow]

 

Does this look correct to you.

 

<?php
for($a=0; $a<10; $a++){

for($i=0; $i<10; $i++){

switch($i.$a){

case(;

$message1=<<<word1

I am redarrow

word1;

echo " $message1 <br> ";

break;

case(9);

$message2=<<<word2

I love php

word2;

echo $message2;

break;

case(10);

$message3=<<<word3

Php rocks!

word3;

echo "$message3 <br> ";

default;
}
}
  }
?>

[taith]

switch($i+$a){