CHAPTER 3

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Variables

Variables are used for storing data during program execution.

Data Types

Depending on what data you need to store there are several kinds of built-in data types. These are often called fundamental data types or primitives. The integer (whole number) types are short, int, long, and long long. The float, double and long double types are floating-point (real number) types. The char type holds a single character and the bool type contains either a true or false value.

Data Type

Size (byte)

Description

char

1

Integer or character

short

2

 

int

4

Integer

long

4 or 8

 

long long

8

 

float

4

 

double

8

Floating-point number

long double ...

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