Question

How to check whether a number is perfect or not in Node.js

Answer 1

// A perfect number is a positive integer that is equal to the sum 
// of its positive divisors, excluding the number itself
 
function isPerfectNumber(n) {
    let i = 1, sum = 0;
       
    while (i < n) {
        if (n % i == 0) {
            sum = sum + i;
        }
        i++;
    }
     
    return sum == n;
}
  
const n = 496;
   
if (isPerfectNumber(n)) {
    console.log(n + " is a Perfect Number");
}
else {
    console.log(n + " is Not a Perfect Number");
}
 
 
      
/*
run:
        
496 is a Perfect Number
        
*/
 

 

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