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# C++ Program to Check Whether Number is Even or Odd

#### In this example, if…else statement is used to check whether a number entered by the user is even or odd.

To understand this example, you should have the knowledge of the following C++ programming topics:

• C++ if, if…else and Nested if…else

Integers which are perfectly divisible by 2 are called even numbers.

And those integers which are not perfectly divisible by 2 are not known as odd number.

To check whether an integer is even or odd, the remainder is calculated when it is divided by 2 using modulus operator %. If remainder is zero, that integer is even if not that integer is 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.```

In this program, if..else statement is used to check whether `n%2 == 0` is true or not. If this expression is true, n is even if not n is odd.

You can also use ternary operators ?: instead of if..else statement. Ternary operator is short hand notation of if…else statement.

## Example 2: Check Whether Number is Even or Odd using ternary operators

``````
#include <iostream>
using namespace std;

int main(){
int n;

cout << "Enter an integer: ";
cin >> n;

(n % 2 == 0) ? cout << n << " is even." :  cout << n << " is odd.";

return 0;
}``````

## C++ for Beginners: C++ Program to Check Whether Number is Even or Odd

#### Free Machine Learning & Data Science Coding Tutorials in Python & R for Beginners. Subscribe @ Western Australian Center for Applied Machine Learning & Data Science. ```