While designing the flow chart, you need to add little more functionality as follows like during any calculation of any arithmetic operation, if result exceeds 2000 or comes equal to 100, user should input the data again, if result comes less than 0, user should get the message that "Zero is the only possibility here" and there must be a clear flow of data like if user enters any invalid input he/she should be looped back to enter valid data again. Invalid data is like ABC, @@#8 or any special character or symbol entered by the user instead of the integer number.