@stdlib/math-base-special-trunc
v0.2.2
Published
Round a double-precision floating-point number toward zero.
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Truncate
Round a double-precision floating-point number toward zero.
Installation
npm install @stdlib/math-base-special-trunc
Usage
var trunc = require( '@stdlib/math-base-special-trunc' );
trunc( x )
Rounds a double-precision floating-point number toward zero.
var v = trunc( -4.2 );
// returns -4.0
v = trunc( 9.99999 );
// returns 9.0
v = trunc( 0.0 );
// returns 0.0
v = trunc( -0.0 );
// returns -0.0
v = trunc( NaN );
// returns NaN
v = trunc( Infinity );
// returns Infinity
v = trunc( -Infinity );
// returns -Infinity
Examples
var randu = require( '@stdlib/random-base-randu' );
var trunc = require( '@stdlib/math-base-special-trunc' );
var x;
var i;
for ( i = 0; i < 100; i++ ) {
x = (randu()*100.0) - 50.0;
console.log( 'trunc(%d) = %d', x, trunc( x ) );
}
C APIs
Usage
#include "stdlib/math/base/special/trunc.h"
stdlib_base_trunc( x )
Rounds a double-precision floating-point number toward zero.
double y = stdlib_base_trunc( 3.14 );
// returns 3.0
The function accepts the following arguments:
- x:
[in] double
input value.
double stdlib_base_trunc( const double x );
Examples
#include "stdlib/math/base/special/trunc.h"
#include <stdio.h>
int main( void ) {
const double x[] = { 3.14, -3.14, 0.0, 0.0/0.0 };
double y;
int i;
for ( i = 0; i < 4; i++ ) {
y = stdlib_base_trunc( x[ i ] );
printf( "trunc(%lf) = %lf\n", x[ i ], y );
}
}
See Also
@stdlib/math-base/special/ceil
: round a double-precision floating-point number toward positive infinity.@stdlib/math-base/special/floor
: round a double-precision floating-point number toward negative infinity.@stdlib/math-base/special/round
: round a numeric value to the nearest integer.
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.