Question

How to Write a program to check it is Peterson number or not in java.

Answer 1

Answer:

// C++ program to determine whether the number is

// Peterson number or not

#include <iostream>

using namespace std;

// To quickly find factorial of digits

int fact[10]

= { 1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880 };

// Function to check if a number is Peterson

// or not

bool peterson(int n)

{

int num = n, sum = 0;

// stores the sum of factorials of

// each digit of the number.

while (n > 0) {

int digit = n % 10;

sum += fact[digit];

n = n / 10;

}

// Condition check for a number to

// be a Peterson Number

return (sum == num);

}

// Driver Program

int main()

{

int n = 145;

if (peterson(n))

cout << "Yes";

else

cout << "No";

return 0;

}

Explanation:

hope it helps