let arr = [2, 3, 5, 7];





















// let arr = [3, 4, 5, 6]

// let modifiedArray = arr.map(function(element){
//     return element * 3
// })

// let users = [
//   {firstName : "Susan", lastName: "Steward"},
//   {firstName : "Daniel", lastName: "Longbottom"},
//   {firstName : "Jacob", lastName: "Black"}
// ];

// let userFullNames = users.map(function(element){
//   return `${element.firstName} ${element.lastName}`;
// });