Sum of n Natural numbers

Question

To Count the sum of n Natural numbers.

Sample TestCaseExpected Output

Enter the n : 3                                                                    Sum of first 3 natural numbers is 6

Answer

num=int(input("Enter  the n : "))

hold=num

sum=0

if num<=0:

    print("Enter a Positive number")

else:

    while num>0:

        sum+=num

        num=num-1

print("Sum of first ",hold,"natural numbers is ",sum)