Module 3

Repeating calculations

Using loops to compute values.

Adding up values

A common pattern is to start with a variable at zero and add to it in each iteration. This is called accumulating.

Python

total = 0
for num in [10, 20, 30]:
    total = total + num
print(total)

→ 60

The variable total starts at 0. Each time through the loop, the current number is added to total. After the loop, total holds the sum.

Your task

Accumulate values