Arrays in subprograms

301.17 Arrays and Records

Arrays and Records — Note 3 of 4

Pass list to functions.

What you need to know

You can pass a list to a function as a parameter. Functions can read, modify, or return new lists. Changes to the list inside the function affect the original.

What to know

Pass a list like any other parameter
The function receives a reference — changes affect the original
Return a new list if you don't want to modify the original
Common pattern: function takes a list and returns a result

Code examples

List as parameter

python

def find_highest(scores):
    highest = scores[0]
    for s in scores:
        if s > highest:
            highest = s
    return highest

marks = [72, 85, 91, 68]
print(find_highest(marks))  # 91

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Specification notes for programming are in Paper 2.