What is the difference between “int” and “uint” / “long” and “ulong”?

Question

I know about int and long (32-bit and 64-bit numbers), but what are uint and ulong?

Answer 1

The difference is that the uint and ulong are unsigned data types, meaning the range is different: They do not accept negative values:

int range: -2,147,483,648 to 2,147,483,647
uint range: 0 to 4,294,967,295

long range: –9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
ulong range: 0 to 18,446,744,073,709,551,615