Write a function that asks the user to enter a number (i) between 1 - 1000, then calculate the sum of all numbers from 1 to (i).

In Python

def sum(num):

      total = 0

      for i in range(1,num+1):

             total = total + i

      print(total)

i = int(input("User input [1 - 1000]: "))

if i >= 1 and i <= 1000:

      sum(i)

else:

      print("Invalid User Input")

Step-by-step explanation:

The function is declared here

def sum(num):

The sum is initialized to 0

      total = 0

The following iteration calculates sum from 1 to the user input

      for i in range(1,num+1):

             total = total + i

The total is then printed

      print(total)

The main begins here

This line prompts user for input

i = int(input("User input [1 - 1000]: "))

The following if condition ensures that user input is between 1 and 1000

if i >= 1 and i <= 1000:

      sum(i)

else:

      print("Invalid User Input")

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step-by-step explanation: