JavaScript : JavaScript Awesomeness

Learn how to write your first JavaScript code by printing text to the page with document.write and showing a warning with alert, while mastering semicolons and code order.

Learn to use JavaScript comments to document code and aid collaboration, noting that comments are not rendered on the page, using // for single-line and /* ... */ for multi-line.

Learn how JavaScript variables act as placeholders. Declare with var, assign with =, print to the page, and follow naming rules with letters, numbers, underscores, and case sensitivity.

Learn how JavaScript distinguishes numbers from strings by using quotation marks to define text, illustrated with var name = 9 and the string Gilad.

Explore using different types of variables in JavaScript, including numbers and strings, and see how quotes convert numbers to strings and affect addition.

Explore JavaScript math operators, including addition, subtraction, multiplication with the star symbol, and division with a forward slash, plus shorthand increment and decrement.

Create and name JavaScript functions to avoid repeating code, define their behavior with curly braces and parentheses, and call them to display alerts or welcome messages.

Explore JavaScript function parameters as dynamic variables by building a three-curtain show: a show curtain function invoked on button clicks with a prize parameter that displays an alert.

Explore adding a second parameter to JavaScript functions, such as a curtain number, to enrich messages. Understand how parameter order affects function calls and button prompts.

Use the return statement to have a function produce a value from parameters you can store in a variable and print, as shown by a basic addition function.

Explore calling a function from another function in JavaScript by defining good night and good morning, with a start function that invokes both with no parameters.

Learn how to use JavaScript if statements to run code when conditions are true, using proper syntax, equality checks (== and !=), and comparisons (>, <, >=).

Explore how else and else if control flow in JavaScript handle if statements by testing conditions, triggering the matching blocks, and falling back to else for the default case.

Explore building a vending pending machine using a switch case statement in JavaScript, defining a vending_pending_machine function, cases for wait times, a pending_message function, and button interactions.

Learn how to use a for loop to initialize a counter, test a condition, and increment it, then combine it with functions to write text.

Learn how arrays replace multiple variables by storing a list in one variable, create an array with new Array, and access or modify items using zero-based indices in square brackets.

Add items to arrays with push, sort arrays alphabetically, and reverse their order to master practical array tricks in JavaScript awesomeness.

Develop password validation by creating a check validation function that reads the password input by id, alerts on incorrect guesses, and submits the form with left trans when correct.

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