Square Root

Compute the principal square root of a single-precision floating-point number.

The principal square root is defined as

StartRoot x squared EndRoot equals StartLayout 1st Row 1st Column x comma 2nd Column if x greater-than-or-equal-to 0 EndLayout

Usage

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

sqrtf( x )

Computes the principal square root of a single-precision floating-point number.

var v = sqrtf( 4.0 );
// returns 2.0

v = sqrtf( 9.0 );
// returns 3.0

v = sqrtf( 0.0 );
// returns 0.0

v = sqrtf( NaN );
// returns NaN

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

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

Examples

var randu = require( '@stdlib/random/base/randu' );
var round = require( '@stdlib/math/base/special/round' );
var sqrtf = require( '@stdlib/math/base/special/sqrtf' );

var x;
var i;

for ( i = 0; i < 100; i++ ) {
    x = round( randu() * 100.0 );
    console.log( 'sqrt(%d) = %d', x, sqrtf( x ) );
}

C APIs

Usage

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

stdlib_base_sqrtf( x )

Computes the principal square root of a single-precision floating-point number.

float y = stdlib_base_sqrtf( 9.0f );
// returns 3.0f

The function accepts the following arguments:

  • x: [in] float input value.
float stdlib_base_sqrtf( const float x );

Examples

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

int main() {
    float x[] = { 3.14f, 9.0f, 0.0f, 0.0f/0.0f };

    float y;
    int i;
    for ( i = 0; i < 4; i++ ) {
        y = stdlib_base_sqrtf( x[ i ] );
        printf( "sqrt(%f) = %f\n", x[ i ], y );
    }
}