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@stdlib/math-base-assert-is-integer
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Test if a finite double-precision floating-point number is an integer.
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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.
When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
Test if a finite double-precision floating-point number is an integer.
npm install @stdlib/math-base-assert-is-integer
var isInteger = require( '@stdlib/math-base-assert-is-integer' );
Tests if a finite double-precision floating-point number is an integer.
var bool = isInteger( 1.0 );
// returns true
The function assumes a finite number. If provided positive or negative infinity
, the function will return true
, when, in fact, the result is undefined. If x
can be infinite
, wrap the implementation as follows:
function check( x ) {
return (
x < Infinity &&
x > -Infinity &&
isInteger( x )
);
}
var bool = check( Infinity );
// returns false
bool = check( -Infinity );
// returns false
var isInteger = require( '@stdlib/math-base-assert-is-integer' );
var bool = isInteger( -5.0 );
// returns true
bool = isInteger( 3.14 );
// returns false
bool = isInteger( NaN );
// returns false
#include "stdlib/math/base/assert/is_integer.h"
Tests if a finite double-precision floating-point number is an integer.
bool out = stdlib_base_is_integer( 1.0 );
// returns true
out = stdlib_base_is_integer( 3.14 );
// returns false
The function accepts the following arguments:
[in] double
input value.bool stdlib_base_is_integer( const double x );
#include "stdlib/math/base/assert/is_integer.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
int main( void ) {
double x;
bool v;
int i;
for ( i = 0; i < 100; i++ ) {
x = ( ( (double)rand() / (double)RAND_MAX ) * 100.0 ) - 50.0;
v = stdlib_base_is_integer( x );
printf( "x = %lf, is_integer(x) = %s\n", x, ( v ) ? "true" : "false" );
}
}
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.
See LICENSE.
Copyright © 2016-2024. The Stdlib Authors.
FAQs
Test if a finite double-precision floating-point number is an integer.
The npm package @stdlib/math-base-assert-is-integer receives a total of 44,165 weekly downloads. As such, @stdlib/math-base-assert-is-integer popularity was classified as popular.
We found that @stdlib/math-base-assert-is-integer demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
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