#4 - Armstrong number or not

What is Armstrong number?

N = 153
Total Digits = 3

= pow(1,3) + pow(5,3) + pow(3,3)
= 1 * 1 * 1 + 5 * 5 * 5 + 3 * 3 * 3
= 1 + 125 + 27
= 153

---

Example 1

Input: 153

Output: Armstrong number

N = 153
Total Digits = 3

= pow(1,3) + pow(5,3) + pow(3,3)
= 1 * 1 * 1 + 5 * 5 * 5 + 3 * 3 * 3
= 1 + 125 + 27
= 153

If result is same as N, it is armstrong number.

---

Example 2

Input: 123

Output: Not Armstrong number

N = 123
Total Digits = 3

= pow(1,3) + pow(2,3) + pow(3,3)
= 1 + 8 + 27
= 36

It is not same as N. So it is not Armstrong number

---

Example 3:

Input: 1634

Output: Armstrong Number

N = 1634
Total Digits = 4

= pow(1,4) + pow(6,4) + pow(3,4) + pow(4,4)
= 1 + 1296 + 81 + 256
= 1634

It is same as given number, Hence this is Armstrong number.

---

Video Solution