Member Avatar for ErangaD

Hi I am very new to PHP
I have two text boxes A and B when I open the web page A is already populated with a number if I input a number in B I want that number to be subtracted by A (A-B) and the answer should be displayed back in A text box
Please help me and give me some sample codes

Thanks
God Bless

Eranga

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hope this will do for you.

<?php

$varA = 10;
$varB = $_REQUEST['valB'];

?>
<input type="text" value="<?php echo $varA; ?>"><br />
<input type="text" id="valB" value="<?php $varB; ?>">
Edited by Ezzaral because: Added code tags. Please use them to format any code that you post.
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