function compareFunction(a, b) {
  return b - a;
}
 
const num = [4, 1, 63, 8, 5, 100, 9, 75];

console.log('Before');
console.log(num);

console.log(`\n----------------------------------------------\n`);


const sort4 = num.sort(compareFunction);


console.log(`returns element: ${sort4}`);
console.log('\nAfter');
console.log(num);