fibonacci function python

1#Python program to generate Fibonacci series until 'n' value
2n = int(input("Enter the value of 'n': "))
3a = 0
4b = 1
5sum = 0
6count = 1
7print("Fibonacci Series: ", end = " ")
8while(count <= n):
9  print(sum, end = " ")
10  count += 1
11  a = b
12  b = sum
13  sum = a + b
14

1# WARNING: this program assumes the
2# fibonacci sequence starts at 1
3def fib(num):
4	"""return the number at index `num` in the fibonacci sequence"""
5    if num <= 2:
6        return 1
7    return fib(num - 1) + fib(num - 2)
8
9# method 2: use `for` loop
10def fib2(num):
11	a, b = 1, 1
12	for _ in range(num - 1):
13		a, b = b, a + b
14	return a
15
16
17print(fib(6))  # 8
18print(fib2(6))  # same result, but much faster

1# Implement the fibonacci sequence
2	# (0, 1, 1, 2, 3, 5, 8, 13, etc...)
3	def fib(n):
4		if n== 0 or n== 1:
5			return n
6		return fib (n- 1) + fib (n- 2) 

1# WARNING: this program assumes the
2# fibonacci sequence starts at 1
3def fib(num):
4  """return the number at index num in the fibonacci sequence"""
5  if num <= 2:
6    return 1
7  return fib(num - 1) + fib(num - 2)
8
9
10print(fib(6))  # 8

1def fib(n):
2    a = 0
3    b = 1
4
5    print(a)    
6    print(b)
7
8    for i in range(2, n):
9        print(a+b)
10        a, b = b, a + b
11
12fib(7) #first seven nubers of Fibonacci sequence

1#Learnprogramo
2Number = int(input("How many terms? "))
3# first two terms
4First_Value, Second_Value = 0, 1
5i = 0
6if Number <= 0:
7print("Please enter a positive integer")
8elif Number == 1:
9print("Fibonacci sequence upto",Number,":")
10print(First_Value)
11else:
12print("Fibonacci sequence:")
13while i < Number:
14print(First_Value)
15Next = First_Value + Second_Value
16# update values
17First_Value = Second_Value
18Second_Value = Next
19i += 1