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Exercise:

Alert "John" by extracting information from the person object.

const person = { firstName: "John", lastName: "Doe" }; alert(person.firstName);

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const person = {
  firstName: "John",
  lastName: "Doe"
};

alert(w3exercise_input_no_0
);

Completed 0 of 67 Exercises:

JS Variables

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Go to JS Variables Tutorial

JS Operators

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Go to JS Operators Tutorial

JS Data Types

Exercise 1 Go to JS Data Types Tutorial

JS Functions

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Go to JS Functions Tutorial

JS Objects

Exercise 1 Exercise 2 Exercise 3 Go to JS Objects Tutorial

JS Events

Exercise 1 Exercise 2 Exercise 3 Go to JS Events Tutorial

JS Strings

Exercise 1 Exercise 2 Exercise 3 Go to JS Strings Tutorial

JS String Methods

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Go to JS String Methods Tutorial

JS Arrays

Exercise 1 Exercise 2 Exercise 3 Go to JS Arrays Tutorial

JS Array Methods

Exercise 1 Exercise 2 Exercise 3 Go to JS Array Methods Tutorial

JS Array Sort

Exercise 1 Go to JS Array Sort Tutorial

JS Dates

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Go to JS Dates Tutorial

JS Math

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Go to JS Math Tutorial

JS Comparisons

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Go to JS Comparisons Tutorial

JS Conditions

Exercise 1 Exercise 2 Go to JS Conditions Tutorial

JS Switch

Exercise 1 Exercise 2 Go to JS Switch Tutorial

JS For Loops

Exercise 1 Exercise 2 Go to JS For Loops Tutorial

JS While Loops

Exercise 1 Exercise 2 Go to JS While Loops Tutorial

JS Break Loops

Exercise 1 Exercise 2 Go to JS Break Loops Tutorial

JS HTML DOM

Exercise 1 Exercise 2 Exercise 3 Exercise 4 Exercise 5 Exercise 6 Exercise 7 Exercise 8 Exercise 9 Go to JS HTML DOM Tutorial