In this post, we will learn how to check whether a number is even or odd using the C++ Programming language.
Any number which is exactly divisible by 2 is called an even number. For example: 2, 8, 32, 246, . . . , etc.
Similarly, any number which returns a remainder when divided by 2 is called an odd number. For example: 3, 7, 15, 19, . . . , etc.
We will use the following methods to check whether a number is even or odd.
- Using Modulus Operator
- Using Bitwise Operator
So, without further ado, let’s begin this tutorial.
C++ Program to Check Whether Number is Even or Odd
// C++ Program to Check Whether Number is Even or Odd Using Modulus Operator
#include <iostream>
using namespace std;
int main(){
int n;
// Asking for input
cout << "Enter an integer to check: ";
cin >> n;
// Check Even or Odd
if (n % 2 == 0){
cout << n << " is an even number." << endl;
}
else {
cout << n << " is an odd number." << endl;
}
return 0;
}
Output 1
Enter an integer to check: 25
25 is an odd number.
Output 2
Enter an integer to check: 16
16 is an even number.
How Does This Program Work ?
int n;
In this program, we have declared an integer data type variable named n.
// Asking for input
cout << "Enter an integer to check: ";
cin >> n;
The user is asked to enter an integer to check for Odd and Even numbers.
// Check Even or Odd
if (n % 2 == 0){
cout << n << " is an even number." << endl;
}
else {
cout << n << " is an odd number." << endl;
}
Now, we use the (%) modulus operator to check the number. Modulus (%) operator returns the remainder after division. If the remainder is equal to 0, then the entered number is an even number otherwise the entered number is an odd number.
C++ Program to Check Whether a Number is Even or Odd Using Bitwise Operator
// C++ Program to Check Whether a Number is Even or Odd Using Bitwise Operator
#include <iostream>
using namespace std;
int main(){
int n;
// Asking for input
cout << "Enter an integer to check Odd/Even: ";
cin >> n;
// Checking using bitwise operator
(n % 2 == 0) ? cout << n << " is an even number." : cout << n << " is an odd number.";
return 0;
}
Output 1
Enter an integer to check Odd/Even: 19
19 is an odd number.
Output 2
Enter an integer to check Odd/Even: 26
26 is an even number.
Conclusion
I hope after going through this post, you understand how to check whether a number is even or odd using the C++ Programming language.
If you have any doubt regarding the program, then contact us in the comment section. We will be delighted to solve your doubts.
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