PHP Arithmetic Operators

In this lesson, you will learn about operations in PHP, in particular the arithmetic operations, and their usage, along with examples to better understand the topic.

PHP Operators

Like in general mathematics, operators are utilized for performing operations on variables. Operations on operands are performed using the PHP Operator symbol. The variable operations are performed with the help of operators. Consider this:

$numVar = 524 + 400;// + is the operator and 524,400 are operands

On behalf of operands, we can also classify operators. The binary + operator, the operands (524 and 400), and the variable $numVar are all used in the example above. They fall into one of the following categories

Unary operators

Operating on a single operand, unary operators include ++, --, and so forth.

Binary operators

Binary operators, which work with two operands, include binary or, and(&), Or (|), Xor (^)

Ternary operators

Operate on three operands using a ternary operator, such as “?:”.

PHP Arithmetic Operators

The following PHP arithmetic operators are given below and used for numeric values to perform arithmetic operations.

Example

Example
<?PHP
echo "PHP Arithmetic Operators Example";
echo "<br>";
echo "  ---------------------------------------- ";
echo "<br>";
$a = 25;
$b = 20;
echo '$a  = 25';
echo "<br>";
echo '$b  = 20';
echo "<br>";
$c = + $a;
echo "Identity Operator-> ", '+$a  =', $c;
echo "<br>";
$c = - $a;
echo "Negation Operator-> ", '-$a  =', $c;
echo "<br>";
$c = $a + $b;
echo "Add Operator-> ", '$a + $b =', $c;
echo "<br>";
$c = $a - $b;
echo "Substract Operator -> ", '$a - $b =', $c;
echo "<br>";
$c = $a * $b;
echo "Multiply Operator -> ", '$a * $b =', $c;
echo "<br>";
// quotient of $a and $b. Moreover, the division operator displays a floating value except in the case when two operands are integers and these integers are consistently divisible with each other.
$c = $a / $b;
echo "Divide Operator -> ", '$a / $b =', $c;
//The remainder of $a divided by $b. Moreover, prior to processing of the expression, the operands of modulus are also changed by shedding the decimal part. The modulo operator % displays the same sign of result as the dividend.
$c = $a % $b;
echo "<br>";
echo "Modulus Operator -> ", '$a % $b =', $c;
$c = $a % -$b;
echo "<br>";
echo "Modulus Operator -> ", '$a % -$b =', $c;
$c = - $a % $b;
echo "<br>";
echo "Modulus Operator -> ", '-$a % $b =', $c;
$c = - $a % -$b;
echo "<br>";
echo "Modulus Operator -> ", '-$a % -$b =', $c;
$c = $a**$b;
echo "<br>";
echo "Exponent Operator -> ", '$a ** $b =', $c;
$c = $a++;
echo "<br>";
echo "Increment Operation -> ", '$a++ =', $c;
echo "<br>";
$c = $a--;
echo "Decrement Operation -> ", '$a -- =', $c;
echo "<br>";
?>

Output

PHP Arithmetic Operators Example
---------------------------------------- 
$a = 25
$b = 20
Identity Operator-> +$a =25
Negation Operator-> -$a =-25
Add Operator-> $a + $b =45
Substract Operator -> $a - $b =5
Multiply Operator -> $a * $b =500
Divide Operator -> $a / $b =1.25
Modulus Operator -> $a % $b =5
Modulus Operator -> $a % -$b =5
Modulus Operator -> -$a % $b =-5
Modulus Operator -> -$a % -$b =-5
Exponent Operator -> $a ** $b =9.0949470177293E+27
Increment Operation -> $a++ =25
Decrement Operation -> $a -- =26

This concludes the Arithmetic Operators in PHP lesson. In the next lesson, you will study another type of operation in PHP programming, the Comparision Operators.