**nterms =int(input())**

**# first two terms**

**n1 = 0**

**n2 = 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 upto",nterms,":")**

** while count < nterms:**

** print(n1,end=' , ')**

** nth = n1 + n2**

** # update values**

** n1 = n2**

** n2 = nth**

** count += 1**