The document discusses running total algorithms which start at zero and add user-entered numbers to a running total within a loop. It provides pseudocode and Python code examples to calculate running totals for both a known number of 5 values and an unknown number of values by continuously adding user input to the total until a sentinel value is entered.

1. Running total within a loop

2. Running total within a loop
The purpose of the running total algorithm is to add up a
list of values
The running total always starts at zero
The program asks the user to enter a number, and this
number is added to the running total
At the end of the program, the total is displayed

3. Running total within a loop

4. Pseudocode
Pseudocode to add 5 numbers to a running total within a
list

5. Code
Python code to add 5 numbers to a running total within a
list

6. Unknown number of values
The previous example only works if we know in advance
how many numbers need to be added to the total
In the previous example, the program will always ask the
user for 5 numbers, and add each to the total
But what if we don’t know how many numbers are to be
added?

7. Pseudocode
Pseudocode to add an unknown number of values to a
running total within a list

8. Code
Python code to add an unknown number of values to a
running total within a list