Check Neon Number
Check Neon Number in C++ (4 Programs)
IntermediateTopic: Advanced Number Programs
C++ Check Neon Number Program
This program helps you to learn the fundamental structure and syntax of C++ programming.
#include <iostream>
using namespace std;
bool isNeon(int num) {
int square = num * num;
int sum = 0;
while (square > 0) {
sum += square % 10;
square /= 10;
}
return sum == num;
}
int main() {
int num;
cout << "Enter a number: ";
cin >> num;
if (isNeon(num)) {
cout << num << " is a Neon number" << endl;
} else {
cout << num << " is not a Neon number" << endl;
}
return 0;
}Output
Enter a number: 9 9 is a Neon number
Understanding Check Neon Number
A Neon number is a number where the sum of digits of its square equals the number itself. For example, 9² = 81, and 8 + 1 = 9. This program demonstrates 4 different methods to check for neon numbers.
Note: To write and run C++ programs, you need to set up the local environment on your computer. Refer to the complete article Setting up C++ Development Environment. If you do not want to set up the local environment on your computer, you can also use online IDE to write and run your C++ programs.