Exercises

Recap Questions

Do all functions need to return something?

Not at all, for instance they can just console.log something.

How can we check what a function returns?

With the aid of console.log, like:

function sum(a, b) {
  return a + b;
}

console.log('The sum of 2 and 3 is', sum(2, 3));

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Write a function called getAverage that takes two numbers as parameters, and returns their average value (i.e. the half of their sum).

Call the function three times with different arguments, and check if your expectation is met.

Important: the function does not need to log anything.

Possible solution

function getAverage(a, b) {
  return (a + b) / 2;
}

console.log(getAverage(2, 3));
console.log(getAverage(10, 20));
console.log(getAverage(5, -5));

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Write a function called max that takes two numbers as parameters, and returns the greater of the two.

Hint: you can use the return keyword inside an if block.

Call the function three times with different arguments, and check if your expectation is met.

Important: the function does not need to log anything.

Possible solution

function max(a, b) {
  if (a > b) {
    return a;
  }
  return b;
}

console.log(max(2, 3));
console.log(max(20, 10));
console.log(max(5, -5));

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