Glossary · Phase 0 · Tools

Argument

Also written: arguments, parameter, parameters

A value you hand to a function when you call it, like the number in round(3.7).

Defining a function doesn't run it. It runs when you call it: the name, followed by parentheses holding the values to use. Those values are the arguments. In click_through_rate(5470, 182340), 5470 goes into clicks and 182340 into impressions, matched by position.
From the lesson Functions

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Python skips the body on line 1 until line 5 calls the function. Each call gets its own frame with its own spend, clicks and cpc, which disappears when the function returns.

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Functions · Package steps into reusable, testable pieces with inputs and outputs. About 25 minutes.

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Other terms from the same lesson

function: A named, reusable piece of code that takes inputs and gives back a result.
return value: What a function hands back when it finishes.

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