Write a program to find sum of series Hint:1+2+3+4+n Test Case 1 Input (stdin) 18 Expected Output 171 Test Case 2 Input (stdin) 100 Expected Output 5050
num = int(input())
hold = num
sum = 0
if num <= 0:
print("Enter a whole positive number!")
else:
while num > 0:
sum = sum + num
num = num - 1;
print(sum)