Rest and Spread Syntax (…args)

1. Rest:

Allows a function to accept an indefinite number of arguments as an array.

Example:

JavaScript
function sum(...numbers) {
  return numbers.reduce((total, num) => total + num); 
// reduce() method is used to iterate through the array and accumulate a result by applying a function to each element.
}

console.log(sum(1, 2, 3));  // Output: 6

2. Spread:

Expands an array into individual elements

Example:

JavaScript
let arr = [1, 2, 3];
console.log(...arr);  // Output: 1 2 3

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