/C

# isgreater

Defined in header `<math.h>`
`#define isgreater(x, y) /* implementation defined */`
(since C99)

Determines if the floating point number `x` is greater than the floating-point number (`y`), without setting floating-point exceptions.

### Parameters

 x - floating point value y - floating point value

### Return value

Nonzero integral value if `x > y`, `​0​` otherwise.

### Notes

The built-in `operator>` for floating-point numbers may set `FE_INVALID` if one or both of the arguments is NaN. This function is a "quiet" version of `operator>`.

### Example

```#include <stdio.h>
#include <math.h>

int main(void)
{
printf("isgreater(2.0,1.0)      = %d\n", isgreater(2.0,1.0));
printf("isgreater(1.0,2.0)      = %d\n", isgreater(1.0,2.0));
printf("isgreater(INFINITY,1.0) = %d\n", isgreater(INFINITY,1.0));
printf("isgreater(1.0,NAN)      = %d\n", isgreater(1.0,NAN));

return 0;
}```

Possible output:

```isgreater(2.0,1.0)      = 1
isgreater(1.0,2.0)      = 0
isgreater(INFINITY,1.0) = 1
isgreater(1.0,NAN)      = 0```

### References

• C11 standard (ISO/IEC 9899:2011):
• 7.12.14.1 The isgreater macro (p: 259)
• F.10.11 Comparison macros (p: 531)
• C99 standard (ISO/IEC 9899:1999):
• 7.12.14.1 The isgreater macro (p: 240)

 isless (C99) checks if the first floating-point argument is less than the second (function macro) C++ documentation for `isgreater`