find last digit of number

#include <iostream>

int lastDigit(int number);

int main() {
    int num;
    std::cout << "Enter a number: ";
    std::cin >> num;

    int result = lastDigit(num);

    std::cout << "The last digit of the number is: " << result << std::endl;

    return 0;
}

int lastDigit(int number) {
    return number % 10;
}