@stdlib/math-base-special-invf
v0.2.3TypeScript
Compute the multiplicative inverse of a single-precision floating-point number.
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Published by The Stdlib Authors
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invf
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> Compute the [multiplicative inverse][multiplicative-inverse] of a single-precision floating-point number.
The [multiplicative inverse][multiplicative-inverse] (or reciprocal) is defined as
Installation
``bash`
npm install @stdlib/math-base-special-invf
Usage
`javascript`
var invf = require( '@stdlib/math-base-special-invf' );
#### invf( x )
Computes the [multiplicative inverse][multiplicative-inverse] of a single-precision floating-point number x.
`javascript
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
`javascript
var discreteUniform = require( '@stdlib/random-array-discrete-uniform' );
var logEachMap = require( '@stdlib/console-log-each-map' );
var invf = require( '@stdlib/math-base-special-invf' );
var opts = {
'dtype': 'float32'
};
var x = discreteUniform( 100, -50, 50, opts );
logEachMap( 'invf(%0.4f) = %0.4f', x, invf );
`
*
C APIs
$3
`c`
#include "stdlib/math/base/special/invf.h"
#### stdlib_base_invf( x )
Computes the multiplicative inverse of a single-precision floating-point number.
`c`
float y = stdlib_base_invf( 2.0f );
// returns 0.5f
The function accepts the following arguments:
- x: [in] float input value.
`c`
float stdlib_base_invf( const float x );
$3
`c
#include "stdlib/math/base/special/invf.h"
#include
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( "invf(%f) = %f\n", x[ i ], y );
}
}
`
*
See Also
- [@stdlib/math-base/special/inv][@stdlib/math/base/special/inv]: compute the multiplicative inverse of a double-precision floating-point number.
*
Notice
This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib].
#### Community
[![Chat][chat-image]][chat-url]
---
License
See [LICENSE][stdlib-license].
Copyright
Copyright © 2016-2026. The Stdlib [Authors][stdlib-authors].
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[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
[deno-url]: https://github.com/stdlib-js/math-base-special-invf/tree/deno
[deno-readme]: https://github.com/stdlib-js/math-base-special-invf/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/math-base-special-invf/tree/umd
[umd-readme]: https://github.com/stdlib-js/math-base-special-invf/blob/umd/README.md
[esm-url]: https://github.com/stdlib-js/math-base-special-invf/tree/esm
[esm-readme]: https://github.com/stdlib-js/math-base-special-invf/blob/esm/README.md
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[stdlib-license]: https://raw.githubusercontent.com/stdlib-js/math-base-special-invf/main/LICENSE
[multiplicative-inverse]: https://en.wikipedia.org/wiki/Multiplicative_inverse
[@stdlib/math/base/special/inv]: https://www.npmjs.com/package/@stdlib/math-base-special-inv