We've covered a lot about functions—creating them, using parameters, and returning values. Now let's put it all together by building a useful function 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, given a list of scores.
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What information do we need to provide to this function as parameters?
Here's our plan: our function will accept an array of scores. It will then calculate the average score and return a letter grade based on that average.
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Can you see the logical flow?
Let's implement it! We can use a for loop to sum the scores, then divide to get the average. The if/else if chain then determines the grade.
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What could be the next line in our function above?
Common function mistakes include forgetting return statements, mixing up parameter order, or using unclear names. Always test your functions with different inputs to catch these issues early.
