stdlib-js
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About stdlib...
</summary>
We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.
The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.
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Truncate
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Round a double-precision floating-point number toward zero.
bash
npm install @stdlib/math-base-special-trunc
javascript
var trunc = require( '@stdlib/math-base-special-trunc' );
#### trunc( x )
Rounds a double-precision floating-point number toward zero.
javascript
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
javascript
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
#include "stdlib/math/base/special/trunc.h"
#### stdlib_base_trunc( x )
Rounds a double-precision floating-point number toward zero.
c
double y = stdlib_base_trunc( 3.14 );
// returns 3.0
The function accepts the following arguments:
- x: [in] double input value.
c
double stdlib_base_trunc( const double x );
c
#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 );
}
}
@stdlib/math-base/special/ceil][@stdlib/math/base/special/ceil]: round a double-precision floating-point number toward positive infinity.
- [@stdlib/math-base/special/floor][@stdlib/math/base/special/floor]: round a double-precision floating-point number toward negative infinity.
- [@stdlib/math-base/special/round][@stdlib/math/base/special/round]: round a numeric value to the nearest integer.
