1. Integer variables are used to store integer data. There are three types of integers: int, short, and long according to the range of values.
2. All three integers are signed by default. Signed integers can be positive, negative, and 0. An integer can also be specified as unsigned if necessary, in which case the integer variable can hold only non-negative numbers.
The above mentioned short, long, signed, and unsigned are type modifiers that complement the properties of a variable
3.3.20.1 VS2013 demonstrates the use of data variables
3.3.20.3 Differences between unsigned data variables
3.3.20.4 Summary of difficulties
