finite

Name

finite, finitef, finitel
- test for infinity or not-a-number (NaN)

Library

libm.lib

Synopsis

#include <math.h>

double finite (double x);

float finitef (float x);

long double finitel (long double x);

Detailed description

The finite finitef and finitel functions return a non-zero value if value is neither infinite nor a "not-a-number" (NaN) value, and 0 otherwise.

Examples

#include <math.h>
int main( void )
{
   double x;
   int y; 
   x = 1.34565;
   y = finite( x );
   printf( "finite( %f ) =  %d\n", x, y );
   y = finitef( x );
   printf( "finitef( %f ) = %d\n",x, y );
   y = finitel( x );
   printf( "finitel( %f ) = %d\n",x, y );
}

Output

finite ( 1.34565 ) = 1
finitef( 1.34565 ) = 1
finitel( 1.34565 ) =

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