Draw a flowchart to calculate Sum = 1+2+3+...+n

As a text-based AI, I'm unable to draw a flowchart. However, I can describe the steps you would take to create one:

1. Start: This is the entry point of the flowchart.

2. Input: Create an input box where the user will enter the value of 'n'.

3. Initialize Sum to 0: This is the first operation in the flowchart. It sets the initial value of Sum to 0.

4. Loop: Create a loop that starts from 1 and ends at 'n'.

5. Inside the loop: Add the loop counter to the Sum.

6. End of loop: This is where the loop ends. If the current value of the loop counter is less than or equal to 'n', go back to step 4. If not, proceed to the next step.

7. Output: Display the value of Sum.

8. End: This is the exit point of the flowchart.

Remember, the flowchart should have arrows connecting these steps in the order they occur.