even and odd in c++

To determine whether a number is even or odd in C++, you can use the modulus operator (%). The modulus operator returns the remainder of a division operation.

Here are the steps to determine whether a number is even or odd in C++:

1. Declare a variable to store the input number, for example, "num".

2. Read the input number from the user and assign it to the "num" variable.

3. Use the modulus operator (%) to check if the remainder when "num" is divided by 2 is equal to 0.

4. If the remainder is 0, then the number is even. You can display a message to indicate that the number is even.

5. If the remainder is not 0, then the number is odd. You can display a message to indicate that the number is odd.

Here is a code example:

#include <iostream>

int main() {
    int num;

    std::cout << "Enter a number: ";
    std::cin >> num;

    if (num % 2 == 0) {
        std::cout << "The number is even." << std::endl;
    } else {
        std::cout << "The number is odd." << std::endl;
    }

    return 0;
}

Note: This code snippet reads an integer from the user and checks if it is even or odd using the modulus operator. It then displays the corresponding message.