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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 ) );
}
C APIs
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( void ) {
const 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 );
}
}
See Also
-
@stdlib/math-base/special/inv
: compute the multiplicative inverse of a double-precision floating-point number.
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.
Community
License
See LICENSE.
Copyright
Copyright © 2016-2024. The Stdlib Authors.