We've covered a lot about functions - creating them, using parameters, returning values, defaults, and scope. Now let's put it all together by building useful functions from scratch!
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Ready to become a function-building expert?
Let's design a function step-by-step. We want to calculate the final grade for a student. What information do we need? A slice of scores and maybe different weights for assignments.
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What would you name this function?
Here's our plan: take scores and weights, calculate weighted average, then return a letter grade. Notice how we're breaking this complex task into smaller, manageable steps within one function.
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Can you see the logical flow?
Let's implement it! We'll multiply each score by its weight, sum everything up, then convert the average to a letter grade:
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Why do we divide the total by the sum of the weights?
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Complete this function that calculates the area of a rectangle with optional padding:
