Fibonacci series using loop and recursive functions in Python

Fibonacci numbers in Python

In Fibonacci series of numbers, each number is the sum of the two preceding ones.

0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377

Fn = F(n-1) + F(n-2)

Fibonacci series of numbers by using loop and by recursive functions in Python

Generating Fibonacci Series

We will use while loop

n=15 # number of elements 
i=0  # counter 
n1=1 # One before
n2=0 # two before
while( i<n):
  print(n2, end=', ')
  temp=n1+n2
  n1=n2
  n2=temp
  i = i+1

Output

0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377,

Fibonacci series using recursive functions

Using recursive function

def feb(n):
  if(n<=1):
    return n
  else:
    return ((feb(n-1)+feb(n-2)))
for i in range(0,15):
  print(feb(i), end=', ')

Output

0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377,

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