unsigned long long VS unsigned long long int

Question

I want to know the main difference with unsigned long long and unsigned long long int. Can they be used inter-changeably.

For calculations involving huge decimal numbers like 9223372036854775807, which one is preferred? Thanks.

Answer 1

Both of following types are semantically equivalent: minimum 64bit integer without sign and with equal or bigger size than unsigned long int

unsigned long long

unsigned long long int