Question

Use Python
The Fibonacci sequence starts 1, 1, 2, 3, 5, 8, . . .. Each number in the sequence (after the first two) is the sum of the previous two. Write a program that computes and outputs the nth Fibonacci number, where n is a value entered by the user.
SAMPLE RUN
--- Prompts For Keyboard/Console/Standard Input ---
Enter n:
Inputs
--- Keyboard/Console/Standard Input stdin ---
4
Outputs
--- Monitor/Console/Standard Output ---
Enter n: 4
The Fibonacci number is 3

Answer 1

Answer:

terms = int(input("Enter n? "))

n1 = 0

n2 = 1

count = 0

while count < terms:

   nterm = n1 + n2

   n1 = n2

   n2 = nterm

   count += 1

print(n1)

Explanation:

This prompts user for n

terms = int(input("Enter n? "))

The next lines initialises the first two terms of the series

n1 = 0

n2 = 1

This initialises count to 0

count = 0

The following iteration is used to determine the number at the nth position

while count < terms:

   nterm = n1 + n2

   n1 = n2

   n2 = nterm

   count += 1

This prints the required number

print(n1)