Python Program to Generate the Fibonacci sequence

In this example, we will write a simple program to take input number from the user and display the Fibonacci sequence up to n terms. To better understand this example, make sure you have knowledge of the following tutorials:-

The sequence Fn of Fibonacci numbers is defined by the recurrence relation:-
Fn = Fn-1 + Fn-2 with seed values F0 = 0 and F1 = 1.
E.g. 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, ……..

Python Program to Generate the Fibonacci sequence

The output of the above program is:-

How many terms for the Fibonacci sequence?: 10
Fibonacci sequence up to 10 :
0 1 1 2 3 5 8 13 21 34

Program Explanation

The user provides the input for the number of items to generate in the Fibonacci series. Next, the initialization process takes place for seed value for 2 variables, n1, and n2 with n1=0 and n2=1. A counter count maintains the track of the generation of the series up to n terms. The negative number is not taken into account with the first condition in the if statement. A while loop keeps the sum of the first two terms and proceeds the series by interchanging the variables.

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