subtracting from a number untill its equal to another number..

[sir pannels]

hey..
hmm ok as the title says.. ive searched on the net for any code on this.
i know i need to use a forloop but im unsure how, i never liked loops lol.
i have a val you lets call $val1 and another $val2 and $val3
and i need to do some kinda lop so that it keeps subtracting.. hmm lets say 50 from val1 untill it is equal to or less than $val2and once it is it gives you the final result as $val3.
any ideas?
thanks
P

[jcma]

PHP Code:

   $var1 = X;
   $var2 = Y;
   $var3 = $var1;
   while($var3 > $var2)
        $var3 -=50;

   echo "var1 $var1<br>var2 $var2 <br>var3 $var3"; 


[sir pannels]

hey.
Thanks -
i put that r ight into a php file an dadded the <? ?> but i get a error on line 4.. any ideas?

[jcma]

Originally posted by sir pannels
hey.
Thanks -
i put that r ight into a php file an dadded the <? ?> but i get a error on line 4.. any ideas?

try changing:
$var1 = X and $var2=Y to numbers, like $var1 = 1234 and $var2 = 12

[sir pannels]

i already tried that.... thats what i thought first off but it didnt make a defference.
should this work on all versions of php?

[jcma]

this works fine for me.

PHP Code:


<?php

   $var1 = 251;
   $var2 = 49;
   $var3 = $var1;
   while($var3 > $var2)
        $var3 -=50;

   echo "var1 $var1<br>var2 $var2 <br>var3 $var3";

?>