Callbacks and Higher-Order Functions

What is the output of the following code?

function calculate(x, y, operation) {
  return operation(x, y);
}

const result = calculate(5, 3, function(a, b) {
  return a * b;
});

console.log(result);

8
15
The output is 15. The calculate function is a higher-order function that takes two numbers and an operation function as arguments. It then applies the operation to the numbers and returns the result. In this case, we're passing an anonymous function that multiplies its two arguments. So calculate(5, 3, multiply) computes 5 * 3, which equals 15. This is a classic example of a higher-order function that abstracts the operation to be performed.
2
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