'''1. Python Program to check Armstrong Number?

   HINT : 153 = 1*1*1 + 5*5*5 + 3*3*3  // 153 is an Armstrong number.'''

n = 153 
s = n 
b = len(str(n))
sum1 = 0
while n != 0:
    r = n % 10
    sum1 = sum1+(r**b)
    n = n//10
if s == sum1:
    print("The given number", s, "is armstrong number")
else:
    print("The given number", s, "is not armstrong number")
	
Output: The given number 153 is armstrong number

'''2. Python Program for How to check if a given number is Fibonacci number?

   HINT : A Fibonacci sequence is the integer sequence of 0, 1, 1, 2, 3, 5, 8....

          The first two terms are 0 and 1. 
          
          All other terms are obtained by adding the preceding two terms. 

          This means to say the nth term is the sum of (n-1)th and (n-2)th term.
          
          '''
code:
n=int(input('Please Enter a number:'))
prev,next,i=0,1,0
while i<=n:
  if(i == n):
    break
  i=prev+next
  prev=next
  next=i
if(i==n):
  print(n, 'the given number  is a Fibonacci number')
else:
  print(n, 'the given number is not a Fibonacci number')

Output:
Please Enter a number:13
13 the given number  is a Fibonacci number