unsigned, signed  : Also used only for int. Unsigned modifies int to positive number range. Signed is the default modifier for all of the data types. unsigned restricts the data type so that it can only store positive values. By default all data types are signed. Signed means that the data type is capable of storing both positive and negative values.

long  long : The size of  long long modifier is at least 64 bits. Again was with both the short and long we have two types of the long long, signed and unsigned.