C Language Zemi

UINT64_MAX --Constant representing the maximum value of uint64_t

UINT64_MAX is a constant that represents the maximum value of uint64_t --unsigned 64-bit integer type. It can be used by including the " stdint.h" header. This is the constant macro introduced in C99.

#include <stdio.h>
#include <stdint.h>

int main (void) {
  printf("%llu", UINT64_MAX);
}

The value of UINT64_MAX.

18446744073709551615

UINT64_MAX is a macro introduced in C99. "%Llu" is used in the format specifier of printf function.