Python program to print Fibonacci sequence

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In this program, you will learn to use a while loop to print the Fibonacci sequence.

To understand this example, you should understand the followingPython programmingTopic:

• Python if ... else statement

• Python while loop

The Fibonacci sequence is 0,1,1,2,3,5,8 ... of the integer sequence.

The first two are 0 and1. All other items are obtained by adding the first two items. This means that the nth item is the (n-1)-2)

# Source code

nterms = int(input("How many items? "))
# The first two items
, n
nth10,2　=　1
count = 0
# Check if nterms is valid
if nterms <= 0:
　　　print("Please enter a positive integer")
elif nterms ==　1:
　　　print("Fibonacci sequence up to", nterms, ":")
　　　print(n1)
else:
　　　print("Fibonacci sequence:")
　　　while count < nterms:
　　　　　　　print(n1)
　　　　　　　nth = n1　+　nth2
　　　　　　　# Update value
　　　　　　　nth1　=2
　　　　　　　nth2　=
　　　　　　　count　+=　1

Output result

How many items?　8
Fibonacci sequence:
0
1
1
2
3
5
8
13

Here, we store the number of items in nterms. We initialize the first item to 0, and the second item to1.

If the number of items is greater than2We use a while loop to find the next item in the sequence by adding the first two items. Then, we swap the variables (update them) and continue the process.

You can also solve this problem using recursion: Python program using recursionTo print the Fibonacci sequence.

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