CPP : Check Whether Number is Even or Odd

Example 1: Check Whether Number is Even or Odd using if else

#include <iostream>

using namespace std;

int main()

{

    int n;

    cout << "Enter an integer: ";

    cin >> n;

    if ( n % 2 == 0)

        cout << n << " is even.";

    else

        cout << n << " is odd.";

    return 0;

}

Output

Enter an integer: 23

23 is odd.

 

Example: Check Vowel or a Consonant Manually

#include <iostream>

using namespace std;

int main()

{

    char c;

    int isLowercaseVowel, isUppercaseVowel;

    cout << "Enter an alphabet: ";

    cin >> c;

    // evaluates to 1 (true) if c is a lowercase vowel

    isLowercaseVowel = (c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u');

    // evaluates to 1 (true) if c is an uppercase vowel

    isUppercaseVowel = (c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U');

    // evaluates to 1 (true) if either isLowercaseVowel or isUppercaseVowel is true

    if (isLowercaseVowel || isUppercaseVowel)

        cout << c << " is a vowel.";

    else

        cout << c << " is a consonant.";

    return 0;

}

Output

Enter an alphabet: u

u is a vowel.