Numerous Panicky Mimes

# npm

## @stdlib/math-base-special-invf

0.0.5 • Public • Published

# invf

Compute the multiplicative inverse of a single-precision floating-point number.

The multiplicative inverse (or reciprocal) is defined as

## Installation

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

## Usage

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

#### invf( x )

Computes the multiplicative inverse of a single-precision floating-point number x.

var v = invf( -1.0 );
// returns -1.0

v = invf( 2.0 );
// returns 0.5

v = invf( 0.0 );
// returns Infinity

v = invf( -0.0 );
// returns -Infinity

v = invf( NaN );
// returns NaN

## Examples

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

var x;
var i;

for ( i = 0; i < 100; i++ ) {
x = round( randu()*100.0 ) - 50.0;
console.log( 'invf(%d) = %d', x, invf( x ) );
}

## Installation

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

### Usage

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

#### stdlib_base_invf( x )

Computes the multiplicative inverse of a single-precision floating-point number.

float y = stdlib_base_invf( 2.0f );
// returns 0.5f

The function accepts the following arguments:

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

### Examples

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

int main() {
float x[] = { 3.0f, 4.0f, 5.0f, 12.0f };

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

## 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.

## Keywords

### Install

npm i @stdlib/math-base-special-invf

### Repository

github.com/stdlib-js/math-base-special-invf

stdlib.io

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0.0.5

Apache-2.0

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