Data Types and variables in C++

Topic 3| Data Types and Variables



Data Types and Variables

Data Types
Variables
Coding Example




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, Topic 3| Data Types and Variables


Data Types in C++:
The data type specifies the size and type of information the variable will store:

Int 4bytes Stores whole numbers
float 4bytes Stores fractional numbers(up to 7 decimal
digits)
double 8 bytes Stores fractional numbers(up to 15 decimal
digits)
boolean 1 byte Stores 1 or 0 (true or false)
char 1 byte Stores single character/ letter/ number.
short 2 byte Stores short integers


Variables in C++:
Variables are containers for storing data values. Variable’s name can consist of any combination
of upper and lowercase letter, underscores and digits, but a variable name cannot begin with a
digit.

For example:
 Name
 dateOfBirth
 my_name

Variable name should not match with any of the keyword. Keywords are predefined words that
have special meanings to the compiler.

Variable Declaration:
int a;

Variable Initialization:
Syntax:
type variable= value;

Examples:
int a = 1;

char var = ‘a’;




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