Used in variable declarations as a Type-Specifier to indicate that the variable cannot be marked with a negative sign. The minimum value is 0. It applies to char, int, and long data types.
The following table illustrates the difference between signed and unsigned variables.
|char||8 bits||0 to 255||-128 to 127|
|int||16 bits||0 to 65,535||-32,768 to 32,767|
|long||32 bits||0 to 4,294,967,295||-2,147,483,648 to 2,147,483,647|