Ask the user how many numbers for which they want to calculate the sum. Using a for loop, prompt the user to enter that many numbers, one-by-one, keeping track of the sum. At the end, after the user entered all numbers, output the sum.
Create a variable and assign it the value of 0
Prompt the user for how many numbers they have
With a for loop, set it to repeat enough times to get all their values
Prompt the user for a number
Add that number to the variable that started as 0
Output to the user, the sum of all values