Apython script to print fibonacci series first 20 elements

   nterms =20

   # first two terms

   n1, n2 = 0, 1

   count = 0

   # check if the number of terms is valid

   if nterms <= 0:

      print("Please enter a positive integer")

   elif nterms == 1:

      print("Fibonacci sequence upto",nterms,":")

      print(n1)

   else:

      print("Fibonacci sequence:")

      while count < nterms:

          print(n1)

          nth = n1 + n2

          # update values

          n1 = n2

          n2 = nth

          count += 1

Explanation:

Here, we store the number of terms in nterms. We initialize the first term to 0 and the second term to 1.

If the number of terms is more than 2, we use a while loop to find the next term in the sequence by adding the preceding two terms. We then interchange the variables (update it) and continue on with the process.

output:

Fibonacci sequence:

0

1

1

2

3

5

8

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