let arrPush = [1, 2, 3];
arrPush.push(4, 5);
console.log(arrPush); // Output: [1, 2, 3, 4, 5]

let arrPop = [1, 2, 3, 4, 5];
let popped = arrPop.pop();
console.log(popped); // Output: 5
console.log(arrPop); // Output: [1, 2, 3, 4]

let arrShift = [1, 2, 3, 4, 5];
let shifted = arrShift.shift();
console.log(shifted); // Output: 1
console.log(arrShift); // Output: [2, 3, 4, 5]

let arrUnshift = [1, 2, 3];
arrUnshift.unshift(-3, -2, -1, 0);
console.log(arrUnshift); // Output: [-3, -2, -1, 0, 1, 2, 3]

let arrSplice = [1, 2, 3, 4, 5];
arrSplice.splice(2, 1, 'a', 'b');
console.log(arrSplice); // Output: [1, 2, 'a', 'b', 4, 5]

let arrSlice = [1, 2, 3, 4, 5];
let sliced = arrSlice.slice(1, 4);
console.log(sliced); // Output: [2, 3, 4]

let arrConcat1 = [1, 2, 3];
let arrConcat2 = [4, 5];
let concatenated = arrConcat1.concat(arrConcat2);
console.log(concatenated); // Output: [1, 2, 3, 4, 5]

let arrIndexOf = [1, 2, 3, 4, 5, 4];
let index = arrIndexOf.indexOf(4);
console.log(index); // Output: 3

let arrLastIndexOf = [1, 2, 3, 4, 5, 4];
let lastIndex = arrLastIndexOf.lastIndexOf(4);
console.log(lastIndex); // Output: 5

let arrIncludes = [1, 2, 3, 4, 5];
let included = arrIncludes.includes(3);
console.log(included); // Output: true

let arrForEach = [1, 2, 3, 4, 5];
arrForEach.forEach(element => {
  console.log(element);
});
// Output: 1, 2, 3, 4, 5 (each element on a new line)