For Loops with Lists

Section 6.9 For Loops with Lists

Determine Loop Components
1. Start condition and values
2. Iteration variable and/or update condition
3. Termination/final condition
4. Body that is repeated based on indentation
Trace the loop, writing updated values for every iteration or until you identify the pattern

Problem: Given the following code, what is the output?

mixed_numbers = [5, 3, -4, 7, 2]
total = 0
for number in mixed_numbers:
    total = total + number
print("Total:", total)

Starting values:

total = 0
mixed_numbers = [5, 3, -4, 7, 2]
# The initial value for number will be 5, since that is the first element of the list

Termination condition: When we have finished processing the last element of the list (2)

Body that is repeated based on indentation:

total = total + number

For every iteration of loop, write down values.

Total: 13

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