Question

How to check if a number is armstrong number or not in JavaScript

Answer 1

// An Armstrong number of three digits is an integer that the sum 
// of the cubes of its digits is equal to the number itself
 
// 371 is an Armstrong number: 3**3 + 7**3 + 1**3 = 371
 
var n = 371, reminder, sum = 0, tmp;
     
tmp = n;
     
while (n != 0)
{
    reminder = n % 10;
    n = Math.floor(n / 10);
    sum = sum + (reminder * reminder * reminder);
}
if (sum == tmp)
    document.write(tmp + " is an Armstrong number <br />");
else
    document.write(tmp + " is not an Armstrong number <br />");

/*
run:

371 is an Armstrong number 
 
*/

 

70+ SQL courses for beginners and professionals