 # PHP: Arithmetic Operators

## Description

There are five basic arithmetic operators.

• - (subtraction)
• * (multiplication)
•  / (division)
• % (modulus)

The operators are summarized in the following table.

Operator Name Example Result
+ Addition \$x + \$y Sum of \$x and \$y.
- Subtraction \$x - \$y Difference of \$x and \$y.
* Multiplication \$x * \$y Product of \$x and \$y.
/ Division \$x / \$y Quotient of \$x and \$y
% Modulus \$x % \$y Remainder of \$x divided by \$y.

Example:

``````<?php
\$x=100;
\$y=60;
echo "The sum of x and y is : ". (\$x+\$y) ."<br />";
echo "The difference between x and y is : ". (\$x-\$y) ."<br />";
echo "Multiplication of x and y : ". (\$x*\$y) ."<br />";
echo "Division of x and y : ". (\$x/\$y) ."<br />";
echo "Modulus of x and y : " . (\$x%\$y) ."<br />";
?>
``````

Output:

```The sum of x and y is : 160
The difference between x and y is : 40
Multiplication of x and y : 6000
Division of x and y : 1.6666666666667
Modulus of x and y : 40```

View the example in browser

Note : In the case of division, the operator returns a float value if the two operands are not integers.

Previous: PHP Constants
Next: Comparison Operators

﻿

## PHP: Tips of the Day

In PHP, there are two versions of logical AND and OR operators.

Operator True if
\$a and \$b Both \$a and \$b are true
\$a && \$b Both \$a and \$b are true
\$a or \$b Either \$a or \$b is true
\$a || \$b Either \$a or \$b is true

Note that the && and || opererators have higher precedence than and and or. See table below:

Evaluation Result of \$e Evaluated as
\$e = false || true True \$e = (false || true)
\$e = false or true False (\$e = false) or true

Because of this it's safer to use && and || instead of and and or.