PHP Program to Find Square Root of a Number
Given a Number, the task is to find the Square Root of Number in PHP.
Examples:
Input: 15
Output: 5
Input: 30
Output: 5.477
There are three methods to find the square root of the given number, these are:
Table of Content
- Using sqrt() Function
- Using pow() Function
- Using Exponentiation Operator (**)
Using sqrt() Function
The sqrt() function is used to calculate the square root of a number.
Syntax:
float sqrt( $value )
Example:
PHP
<?php function squareRoot( $number ) { return sqrt( $number ); } $num = 36; echo "Square Root: " . squareRoot( $num ); ?> |
Output
Square Root: 6
Using pow() Function
The pow() function is used to calculate the power of a number. Here, we calculate the power 1/2 or 0.5 of given number.
Syntax:
pow($number, 0.5);
Example:
PHP
<?php function squareRoot( $number ) { return pow( $number , 0.5); } $num = 30; echo "Square Root: " . squareRoot( $num ); ?> |
Output
Square Root: 5.4772255750517
Using Exponentiation Operator (**)
The exponential operator (**) is used to calculate the exponent power of number. Here, we use exponent power to 0.5.
Syntax:
$number ** 0.5;
Example:
PHP
<?php function squareRoot( $number ) { return $number ** 0.5; } $num = 36; echo "Square Root: " . squareRoot( $num ); ?> |
Output
Square Root: 6