Write a program that reads an integer N from the keyboards computes and displays the sum of numbers from N to (2*N).

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

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Answer :-

sum = 0

n = int(input("Enter the number :-"))

if n > 0 :
    for i in range (n,n*2+1):
        sum += i
else :
    for i in range (2*n, n+1):
        sum += i

print (sum)

Output :-

Enter the number :- 10
165
>>> 

Enter the number :- -10
-165
>>> 

Enter the number :- 95
13680
>>> 

Enter the number :- -754
-853905
>>>