Check Armstrong Number

Drive: ArmstrongNum.py
~Mohit

In number theory, a narcissistic number^[1][2] (also known as a pluperfect digital invariant (PPDI),^[3] an Armstrong number^[4] (after Michael F. Armstrong)^[5] or a plus perfect number)^[6] in a given number base ${\displaystyle 𝑏}$ is a number that is the sum of its own digits each raised to the power of the number of digits.