practice_7

let empty_array = [];
let array2 = [1, 1.5, false, "string", []];
let array = [1,2,3,4];

console.log(empty_array); // []
console.log(array2); // [1, 1.5, false, "string", []]
console.log(array); // [1, 2, 3, 4]
console.log(array[0]); // 1
console.log(array.length); // 4
console.log(array[4]); // undefined

array[2] = -1;
array.push(5);

console.log(array); // [1, 2, -1, 4, 5]
console.log(array.length); // 5

for(let i = 0; i < array.length; i++) {
    console.log(array[i]);
}
// 1, 2, -1, 4, 5 (on a separate line)