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Compute the multiplicative inverse of a double-precision floating-point number.
The multiplicative inverse (or reciprocal) is defined as
npm install @stdlib/math-base-special-invvar inv = require( '@stdlib/math-base-special-inv' );Computes the multiplicative inverse of a double-precision floating-point number x.
var v = inv( -1.0 );
// returns -1.0
v = inv( 2.0 );
// returns 0.5
v = inv( 0.0 );
// returns Infinity
v = inv( -0.0 );
// returns -Infinity
v = inv( NaN );
// returns NaNvar randu = require( '@stdlib/random-base-randu' );
var round = require( '@stdlib/math-base-special-round' );
var inv = require( '@stdlib/math-base-special-inv' );
var x;
var i;
for ( i = 0; i < 100; i++ ) {
x = round( randu()*100.0 ) - 50.0;
console.log( 'inv(%d) = %d', x, inv( x ) );
}#include "stdlib/math/base/special/inv.h"Computes the multiplicative inverse of a double-precision floating-point number.
double y = stdlib_base_inv( 2.0 );
// returns 0.5The function accepts the following arguments:
-
x:
[in] doubleinput value.
double stdlib_base_inv( const double x );#include "stdlib/math/base/special/inv.h"
#include <stdio.h>
int main( void ) {
const double x[] = { 3.0, 4.0, 5.0, 12.0 };
double y;
int i;
for ( i = 0; i < 4; i++ ) {
y = stdlib_base_inv( x[ i ] );
printf( "inv(%lf) = %lf\n", x[ i ], y );
}
}-
@stdlib/math-base/special/pow: exponential function.
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.
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