isIntegerf
Test if a finite single-precision floating-point number is an integer.
Usage
var isIntegerf = require( '@stdlib/math/base/assert/is-integerf' );
isIntegerf( x )
Tests if a finite single-precision floating-point number is an integer.
var bool = isIntegerf( 1.0 );
// returns true
Notes
The function assumes a finite number. If provided positive or negative
infinity
, the function will returntrue
, when, in fact, the result is undefined. Ifx
can beinfinite
, wrap the implementation as follows:function check( x ) { return ( x < Infinity && x > -Infinity && isIntegerf( x ) ); } var bool = check( Infinity ); // returns false bool = check( -Infinity ); // returns false
Examples
var isIntegerf = require( '@stdlib/math/base/assert/is-integerf' );
var bool = isIntegerf( -5.0 );
// returns true
bool = isIntegerf( 3.14 );
// returns false
bool = isIntegerf( NaN );
// returns false
C APIs
Usage
#include "stdlib/math/base/assert/is_integerf.h"
stdlib_base_is_integerf( x )
Tests if a finite single-precision floating-point number is an integer.
bool out = stdlib_base_is_integerf( 1.0 );
// returns true
out = stdlib_base_is_integerf( 3.14 );
// returns false
The function accepts the following arguments:
- x:
[in] float
input value.
bool stdlib_base_is_integerf( const float x );
Examples
#include "stdlib/math/base/assert/is_integerf.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
int main( void ) {
float x;
bool v;
int i;
for ( i = 0; i < 100; i++ ) {
x = ( ( (float)rand() / (float)RAND_MAX ) * 100.0f ) - 50.0f;
v = stdlib_base_is_integerf( x );
printf( "x = %f, is_integerf(x) = %s\n", x, ( v ) ? "true" : "false" );
}
}