[Type C] Python Revision Tour-1 – Chapter 1

7. Write a program that reads an integer N from the keyboard, computes, and displays the sum of numbers from N to (2N) if N is nonnegative. If N is a negative number, then it’s the sum of the numbers from (2N) to N. The starting and ending points are included in the sum.

N = int(input("Enter an integer: "))

if N >= 0:
    total = sum(range(N, 2*N+1))
else:
    total = sum(range(2*N, N+1))

print("Sum of numbers:", total)

Enter an integer: 3
Sum of numbers: 12