<?php
$int_var=256;
$double=2.54;
$r=$int_var+$double;
echo"$r";
if(2+1==4)
{
echo"this value is equal";
}
else
{
echo"this value is not equal\n";
}
define("constant",80);
echo constant("constant");
$a=10;
$b=200;
echo "$a+$b== , this is arithmetic operation\n";
echo "$b-$a== , this is subtraction operation\n";
echo "$b/$a== , this is division operation\n";
echo "$b%$a==, this is modulus and returns reminder\n";
echo "$a*$b==, this is multipication\n";
echo "++$a, this will increment a value and return a value\n";
echo "$a++, this will first print a value then it increment\n";
echo "$--$b, this will decrement b value and return b \n";
echo "$b--, this will return b value and then decrement\n";