signed and unsigned data types range

Size/Type	Range
1 byte signed	-128 to 127
1 byte unsigned	0 to 255
2 byte signed	-32,768 to 32,767
2 byte unsigned	0 to 65,535
4 byte signed	-2,147,483,648 to 2,147,483,647
4 byte unsigned	0 to 4,294,967,296
8 byte signed	-9,223,372,036,854,775,807 to 9,223,372,036,854,775,807
8 byte unsigned	0 to 18,446,744,073,709,551,615