Edit in JSFiddle

const colors = ['red', 'blue', 'green'];
console.log("Original Array: ",colors);

colors.push('yellow');
console.log("push('yellow'):", colors);

colors.pop();
console.log('pop(): ', colors);

colors.reverse();
console.log('reverse(): ', colors);

colors.sort();
console.log('sort(): ', colors);

const splicedcolors = colors.splice(0, 2);
console.log('splice():', splicedcolors);

const newColors = colors.join("-");
console.log('join():', newColors);