The map() method

map()

The map() method is used to iterate over an array and modify its elements using a callback function. This callback function will run on each array element and return a new array of modified elements.

```
// Syntax
myArray.map(callbackFn)
myArray.map(function(element, index, array){ /* ... */ })
```

For example:
```
let salaries = [100, 300, 500];
let salary = salaries.map(x => x * 2);
console.log(salary);
```