What are some examples of JavaScript functions?

Can you give me some examples of JavaScript functions?

Sure! Here are a few examples of JavaScript functions:

1. A simple function to add two numbers:

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

2. A function that returns the square of a number:

   const square = (x) => x * x;
   

3. A function that checks if a number is even:

   function isEven(num) {
       return num % 2 === 0;
   }
   

Would you like to see more examples or explanations?

Yes, can you explain the first example in detail?

Of course! The add function takes two parameters, a and b, which represent the numbers you want to add. Inside the function, the return statement outputs the sum of a and b. You can call this function like this:

let result = add(5, 3);
console.log(result); // Outputs: 8

What about functions with default parameters?

Great question! Here's an example of a function with default parameters:

function greet(name = 'Guest') {
    return `Hello, ${name}!`;
}

In this case, if you call greet() without an argument, it will use 'Guest' as the default name.