map method to iterate over an array in JavaScript

map

Задание 1

Given an array of numbers. Using the map method, extract the square root of each array element and write the result to a new array.

Задание 2

Given an array with strings. Using the map method, add the character '!' to the end of the value of each array element.

Задание 3

Given an array with strings. Using the map method, reverse the characters of each string.

Задание 4

Given the following array:

javascriptlet arr = ['123', '456', '789'];

Using the map method, transform this array into the following:

javascriptlet arr = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9]
];

Задание 5

Given an array of numbers. Using the map method, write to each element of the array the value of this element multiplied by its index number in the array.