Fibonacci Series

Mahendra Kumar

beginnerlogic

Fibonacci series in Python | In the Fibonacci series, the next element will be the sum of the previous two elements. The Fibonacci sequence is a series of numbers where a number is found by adding up the two numbers before it. Starting with 0 and 1, the sequence goes 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, and so on…

As a rule, the expression is Xn= Xn-1+ Xn-2

# take input
num = int(input('Enter number of terms: '))
# print fibonacci series
a, b = 0, 1
i = 0
# check if the number of terms is valid
if num <= 0:
    print('Please enter a positive integer.')
elif num == 1:
    print('The Fibonacci series: ')
    print(a)
else:
    print('The Fibonacci series: ')
    while i < num:
        print(a, end=' ')
        c = a + b
        a = b
        b = c
        i = i+1