Can you give me examples of using forEach in JavaScript?

Can you give me examples of using forEach in JavaScript?

Sure! The forEach method executes a provided function once for each array element. Here's a simple example:

const numbers = [1, 2, 3, 4];
numbers.forEach(num => {
  console.log(num);
});

This will log each number in the array.

What if I want to modify the elements while using forEach?

The forEach method does not create a new array, but you can modify the original array. For example:

let numbers = [1, 2, 3, 4];
numbers.forEach((num, index) => {
  numbers[index] = num * 2;
});
console.log(numbers); // [2, 4, 6, 8]

Can forEach be used with objects?

No, forEach is specifically for arrays. However, you can use Object.keys() or Object.entries() to iterate over an object's properties. For example:

const obj = { a: 1, b: 2, c: 3 };
Object.keys(obj).forEach(key => {
  console.log(key, obj[key]);
});