shift() return code example
Example: .shift()
// The shift() method removes the first element from an array
// and returns that removed element.
// This method changes the length of the array.
const array1 = [1, 2, 3];
const firstElement = array1.shift();
console.log(array1);
// expected output: Array [2, 3]
console.log(firstElement);
// expected output: 1