Let us change our traditional attitude to the construction of programs. Instead of imagining that our main task is to instruct a computer what to to, let us concentrate rather on explaining to human beings what we want a computer to do. Donald Knuth
An Armstrong Number is a number that is the sum of its own digits each raised to the power of the number of digits
Armstrong numbers are those numbers in which sum of cube of all digits provides the same number.
1^3 = 1
5^3 = 125
3^3 = 27
1^3 + 5^3 + 3^3
= 1 + 125 + 27
153 is an Armstrong Number! 12 is not an Armstrong Number!