The modulus operator (%) returns the remainder after dividing one integer by another. It is commonly used to determine whether a number is even or odd, extract digits from a number, and perform cyclic operations.

The modulus operator is defined only for integral data types such as int, char, short, and long. It cannot be applied directly to floating-point operands.

Source Code #

#include <iostream>

int main()
{
    int dividend = 25;
    int divisor = 4;

    int remainder = dividend % divisor;

    std::cout << "Dividend : " << dividend << '\n';
    std::cout << "Divisor  : " << divisor << '\n';
    std::cout << "Remainder: " << remainder << '\n';

    return 0;
}

Output #

Dividend : 25
Divisor  : 4
Remainder: 1

Explanation #

• The modulus operator (%) computes the remainder after integer division.
• dividend % divisor returns the remainder obtained when dividend is divided by divisor.
• Both operands of the modulus operator must be of integral data types.
• The result is assigned to the variable remainder.
• The modulus operator is frequently used to determine divisibility, such as checking whether a number is even or odd.
• Using the modulus operator with a divisor of zero results in undefined behavior.
• std::cout displays the operands and the calculated remainder.
• return 0; terminates the program successfully.