Data Types

• DataTypes are used for declaring variables And functions of different types.
• When Program store data in variables, It is necessary that each variable must be assigned a specific data type.

Following are the list of Data Types in C :

Keyword	Memory	Range
char or signed char	1 Byte	-128 to 127
unsigned char	1 Byte	0 to 255
int or signed int	2 Byte	-32,768 - 32,767
unsigned int	2 Byte	0 to 65535
short int or signed short int	1 Byte	-128 to 127
unsigned short int	1 Byte	0 to 255
long or signed long	4 Bytes	-2,147,483,648 to 2,147,483,647
unsigned long	4 Bytes	0 to 4,294,967,295
float	4 Bytes	3.4E - 38 to 3.4E + 38
double	8 Byte	1.7E - 308 to 1.7E + 308
long double	10 Bytes	3.4E-4932 to 1.1E + 4932

Declaration of variable :

    main()
    {
    /* declaration */

    //long int is datatype and amount is variable name
    long int amount;

    //int is datatype and code is variable name
    int code;

    char c;

    double average;

    float x,y;

    }