The assignment operator = assigns the value of the expression on its right to the variable on its left.

#include <stdio.h>

int main()
{
    int number;

    number = 10;

    printf("number = %d\n", number);

    number = 25;

    printf("number = %d\n", number);

    return 0;
}

Example Output #

number = 10
number = 25

Explanation #

The assignment:

number = 10;

stores the value 10 in number.

A later assignment:

number = 25;

replaces the previous value with 25.

The right side of an assignment is evaluated first, and its result is assigned to the left operand. The left operand must be a modifiable object that can store the resulting value.