SOURCE

var dataTypes = [
    "string", 
     1, 
     1.0, 
     true, 
     [1, 2, 3], 
     {
          name: "yeuimu", 
          age:22, 
          getName: function() {
              return this.name;
          },
          getAge: function() {
              return this.age;
          }
     }, 
     function() {
         return 1;
     },
     null, 
     undefined
];

const printDataType = (value) => {
    console.log(`Data Type: ${typeof value}`);
}

dataTypes.forEach(printDataType);
console.log(dataTypes[5].getName());