Unsigned and signed int

Question

what is that and how to use it???

Answer 1

Signed int allows for negative values. It ranges between -2,147,483,648 and 2,147,483,647.
Unsigned int only has positive values, so because of this, it has a higher maximum positive value. It ranges between 0 and 4,294,967,295.
You can apply unsigned to longs and shorts, too.