A Beginner's Guide to PHP: A sample Addition program

A sample PHP addition program

<?php
$a=10;
$b=5;
$c=$a+$b;
echo $c;
?>

output will be 15

line 1: opening of PHP script

line 2: $a=10; PHP uses $ sign to declare variables and does not require Data type to be declared.

suppose:

if you declare $a=10; php understands that this of type integer

if you declare $a=10.5; php understands that this of type floating value

if you declare $a='This is PHP tutorial'; php understands that this of type string and so on...

and of course semicolon(;) is required to terminated the statement.

line 3:$b=5; same as above explanation.

line 4: is an expression to add two values and take that value in $c variable

line 5: outputs the Addition by using echo statement followed by $c; variable.

line 6: ends the PHP script.