PHP nl2br() Function

PHP | gmp_sub() Function

Last Updated : 14 Apr, 2018

The gmp_sub() is an in-built function in PHP which returns the subtraction of the two GMP numbers.(GNU Multiple Precision: For large numbers)

Syntax:

gmp_sub($num1, $num2)

Parameters: This function accepts two GMP numbers $num1 and $num2 as mandatory parameters shown in the above syntax. These parameters can be a GMP object in PHP version 5.6 and later, or we are also allowed to pass a numeric string provided that it is possible to convert that string to a number.

Return Value: The function returns the subtraction of two numbers $num1 and $num2.

Examples:

Input : $num1=5 , $num2=10
Output : -5 

Input : $num1=7 , $num2=1
Output : 6

Below programs illustrate the gmp_sub() function:

Program 1: The program below demonstrates the working of gmp_sub() function when GMP number are passed as arguments.

<?php 
// PHP program to subtract two  
// two numbers  
  
// GMP number as arguments  
$num1 = gmp_init("101", 2); 
$num2 = gmp_init("1010", 2);  
  
// 5-10 = -5  
$sub = gmp_sub($num1, $num2);  
  
// gmp_strval converts GMP number to string  
// representation in given base(default 10). 
echo gmp_strval($sub, 2); 
?> 

Output:

-101

Program 2: The program below demonstrates the working of gmp_sub() when numeric string are passed as arguments.

<?php 
// PHP program to subtract two  
// two numbers  
  
// numeric strings number as arguments  
$num1 = "7"; 
$num2 = "1"; 
  
// 7-1 = 6 
$sub = gmp_sub($num1, $num2);  
  
echo $sub; 
?> 

Output:

Reference:
http://php.net/manual/en/function.gmp-sub.php

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ChetnaAgarwal

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