Does GCC support long long int?

Question

Does GCC support:

long long int

which would be a 64-bit integer?

Also, is long long int part of the standard?

Answer 1

Yes, long long is part of C99, as well as long long constants (10222333444555LL) and a few support elements. (LLONG_MAX, llrint(d), llround(d), some others.) And gcc has implemented it for some time now.