@stdlib/math-base-special-sqrtpi NPM

sqrtpi

$NPM version$ $Build Status$ $Coverage Status$

Compute the principal square root of the product of π and a positive number.

Installation

npm install @stdlib/math-base-special-sqrtpi

Usage

var sqrtpi = require( '@stdlib/math-base-special-sqrtpi' );

sqrtpi( x )

Computes the principal square root of the product of π and a positive double-precision floating-point number.

var v = sqrtpi( 4.0 );
// returns ~3.5449

v = sqrtpi( 10.0 );
// returns ~5.60499

v = sqrtpi( 0.0 );
// returns 0.0

v = sqrtpi( NaN );
// returns NaN

For negative numbers, the principal square root is not defined.

var v = sqrtpi( -4.0 );
// returns NaN

Examples

var discreteUniform = require( '@stdlib/random-base-discrete-uniform' );
var sqrtpi = require( '@stdlib/math-base-special-sqrtpi' );

var x;
var i;

for ( i = 0; i < 100; i++ ) {
    x = discreteUniform( 0, 100 );
    console.log( 'sqrtpi(%d) = %d', x, sqrtpi( x ) );
}

C APIs

Usage

#include "stdlib/math/base/special/sqrtpi.h"

stdlib_base_sqrtpi( x )

Computes the principal square root of the product of π and a positive double-precision floating-point number.

double x = stdlib_base_sqrtpi( 4.0 );
// returns ~3.5449

x = stdlib_base_sqrtpi( 10.0 );
// returns ~5.60499

The function accepts the following arguments:

x: [in] double input value.

double stdlib_base_sqrtpi( const double x );

Examples

#include "stdlib/math/base/special/sqrtpi.h"
#include <stdlib.h>
#include <stdio.h>

int main( void ) {
    double x;
    double v;
    int i;

    for ( i = 0; i < 100; i++ ) {
        x = ( (double)rand() / (double)RAND_MAX ) * 100.0;
        v = stdlib_base_sqrtpi( x );
        printf( "sqrtpi(%lf) = %lf\n", x, v );
    }
}

Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.