What are rest parameters in JavaScript?

What are rest parameters in JavaScript?

Rest parameters allow a function to accept an indefinite number of arguments as an array. You use them by adding '...' before the parameter name.

Can you give me an example of how to use rest parameters?

Sure! Here's an example:

function sum(...numbers) {
    return numbers.reduce((acc, curr) => acc + curr, 0);
}
console.log(sum(1, 2, 3, 4)); // Outputs: 10

Are rest parameters the same as the arguments object?

No, they are different. The arguments object is an array-like object, while rest parameters are actual arrays, making them easier to work with.

When should I use rest parameters?

Use rest parameters when you want to create functions that can take a variable number of arguments, improving flexibility.