SUM OF THE SERIES

• Problem Description

  
  Write a program to find sum of series
  Hint:1+2+3+4+n

• CODING ARENA::

• a=int(input())

  sum=0

  for i in range(1,a+1):

      sum=sum+i

  print(sum)

• Test Case 1

  
  Input (stdin)

  18
  
  

  Expected Output

  171

• Test Case 2

  
  Input (stdin)

  100
  
  

  Expected Output

  5050