n = input("Enter Number to calculate sum") n = int (n) sum = 0 for num in range(0, n+1, 1): sum = sum+num print("SUM of first ", n, "numbers is: ", sum )

**Here is what the above code is Doing:**

1. We are taking input from the user and converting it to integer.

2. We are creating a variable sum and initializing it to 0.

3. We are using for loop to iterate from 0 to n.

4. We are adding the value of num to sum.

5. We are printing the sum.