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Exercise:Use comments to describe the correct data type of the following variables:
let length = 16; // @(6)
let lastName = "Johnson"; // @(6)
const x = {
firstName: "John",
lastName: "Doe"
}; // @(6)
let length = 16; // Number
let lastName = "Johnson"; // String
const x = {
firstName: "John",
lastName: "Doe"
}; // Object
let length = 16; // NUMBER
let lastName = "Johnson"; // STRING
const x = {
firstName: "John",
lastName: "Doe"
}; // OBJECT
let length = 16; // number
let lastName = "Johnson"; // string
const x = {
firstName: "John",
lastName: "Doe"
}; // object
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