Returns true if its argument is an infinity.
Include
<math.h>
Prototype
int isinf(floating-point x);
Argument
x
Return Value
Returns true if its argument is either positive or negative infinity; zero otherwise.
Example
#include <math.h>
#include <stdio.h>
int main(void)
{
double x, y, z;
x = 5.0;
y = 0.0;
z = x / y;
if(isinf(z))
printf("Infinity detected in division of %f by %f\n", x, y);
}
Example Output
Infinity detected in division of 5.000000 by 0.000000