The gmp_rootrem() is a built-in function in PHP which is used to calculate the nth root of a GMP number (GNU Multiple Precision : For large numbers) and returns the integer component of the nth root and its remainder .
Syntax :
gmp_rootrem($num,$n)
Parameters : This function accepts two mandatory parameters as shown in the above syntax. They are specified below :
- $num : The parameter can be a GMP object in PHP version 5.6 and later, or we can also pass a numeric string provided that it is possible to convert that string to a number.
- $n : The positive root to be calculated of $num.
Examples :
Input : $num = "8" $n = 2
Output : Array (
[0] => GMP Object ( [num] => 2 )
[1] => GMP Object ( [num] => 4 )
)
Input : $num = "9" $n = 2
Output : Array (
[0] => GMP Object ( [num] => 3 )
[1] => GMP Object ( [num] => 0 )
)
Return Value : This function returns a two element array , both the elements being GMP numbers.
- The first element of the array is the integer component of the nth root of $num.
- The second element is the remainder.
Below programs will illustrate the use of gmp_rootrem() function in PHP :
Program 1 : The below program illustrates the use of the function with GMP number passed as argument.
Output
Array
(
[0] => GMP Object ( [num] => 2 )
[1] => GMP Object ( [num] => 0 )
)
Program 2 : The below program illustrates the use of the function with numeric string passed as argument.
Output
Array (
[0] => GMP Object ( [num] => 563 )
[1] => GMP Object ( [num] => 471343 )
)
Reference : https://www.php.net/manual/en/function.gmp-rootrem.php
