INFINITY

If the implementation supports floating-point infinities, the macro INFINITY expands to constant expression of type float which evaluates to positive or unsigned infinity.

If the implementation does not support floating-point infinities, the macro INFINITY expands to a positive value that is guaranteed to overflow a float at compile time, and the use of this macro generates a compiler warning.

The style used to print an infinity is implementation defined.

[edit] Example

Show style used to print an infinity and IEEE format.

#include <stdio.h>
#include <math.h>
#include <stdint.h>
#include <inttypes.h>
#include <string.h>
 
int main(void)
{
 double f = INFINITY;
 uint64_t fn; memcpy (&fn, &f, sizeof f);
 printf ("INFINITY:  %f %" PRIx64 "\n", f, fn);
}

INFINITY: inf 7ff0000000000000

[edit] References

• In other languages

• العربية
• Česky
• Deutsch
• Español
• Français
• Italiano
• 日本語
• 한국어
• Polski
• Português
• Русский
• Türkçe
• 中文