JavaScript : JavaScript Awesomeness

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.

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

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 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.

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.