C++17 Quick Syntax Reference: A Pocket Guide to the Language, APIs and Library

© Mikael Olsson 2018

Mikael OlssonC++17 Quick Syntax Referencehttps://doi.org/10.1007/978-1-4842-3600-0_3

3. Variables

Mikael Olsson¹ 

(1)

Hammarland, Finland

 

Variables are used for storing data in memory during program execution.

Data Types

Depending on the type of 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 ...