CPSC 120 Check to see if a number is even or not

cpsc120_is_even.cc

// Gist https://gist.github.com/mshafae/978da2ef9ca32695d1ac0396c1427feb
// Filename cpsc120_is_even.cc
// CompileCommand clang++ -std=c++20 cpsc120_is_even.cc
// Check to see if a number is even or not

#include <iostream>

// Poor style
// bool IsEven(int number) {
//   if ((number % 2) == 0) {
//     return true;
//   } else {
//     return false;
//   }
// }

// Better style
// bool IsEven(int number) {
//   bool answer{false};
//   answer = (number % 2) == 0;
//   return answer;
// }

// Best style
bool IsEven(int number) {
  return (number % 2) == 0;
}

int main(int argc, char const* argv[]) {
  int number{7};
  if (IsEven(number)) {
    std::cout << "it is even.\n";
  } else {
    std::cout << "it is not even.\n";
  }
  return 0;
}