c-data-types.md

C Data Types

Overview

• C data types are defined as the data storage format that a variable can store a data to perform a specific operation.
• Data types are used to define a variable before to use in a program.
• Size of a variable, constant and array are determined by data types.

Four Data Types in C Language:

C supports the following basic data types:

• int: integer, a whole number
• char: single character
• float: floating point, a number with a fractional part.
• double: double-precision floating point value.

The amount of storage required for each of these varies by platform. C has a build-in sizeof operator that outputs the memory requirements for a particular data type.

For example:

int main() {
    printf("int: %d \n", sizeof(int));
    printf("float: %d \n", sizeof(float));
    printf("double: %d \n", sizeof(double));
    printf("char: %d \n", sizeof(char));

    return 0;
}

Output:

int: 4 
float: 4 
double: 8 
char: 1 

Other Data Types:

• **Enumeration data type: enum
• **Derived data type: pointer, array, structure, union
• **Void data type: void