Learn JavaScript Fundamentals Phase 1

Learn how to use single line and multi-line comments in JavaScript to improve code readability and maintainability. Follow best practices to keep comments clear and up to date for collaboration.

Learn how to effectively comment JavaScript code in VS Code, using double slashes and keyboard shortcuts, plus the Better Comments extension for to-dos, challenges, and important notes.

Explore variables as containers that store data in JavaScript, using var, let, and const with block scope. Learn naming rules, assignment, and simple concatenation to form full names.

Learn how variables store values in memory in JavaScript, declare them with var, let, or const, and reference or reassign them while observing camel case, Pascal case, and snake case.

Master JavaScript strings, sequences of characters in quotes, to store and manipulate text. Use to uppercase, to lowercase, concat, slice, and the length property to size strings.

Learn how to use strings in JavaScript, including single, double, and backtick quotes, concatenation, interpolation, and knowing the data type, with practical examples and console output.

Explore string methods and properties in JavaScript, including length, toUpperCase, toLowerCase, trim, split, and includes, using dot notation to transform and analyze text. Master zero-based indexing and basic string operations.

Explore how JavaScript handles numbers, the single number type, and how strings convert to numbers using Parseint or the number function. Learn about floating point precision, exponents, and modulus.

Learn how booleans function as the binary true or false data type that drives decision making, loops, and conditional logic in JavaScript.

Learn how booleans represent true and false in JavaScript, use the bang operator to flip values, and apply booleans in conditionals with examples like age checks in code.

Master conditional logic in JavaScript by using if, else, and else if to control code flow and respond to user input.

Explore JavaScript operators in depth, including strictly and loosely equal comparisons, relational operators, and logical not, and examine true/false outcomes and type coercion through practical code examples.

Explore conditionals in JavaScript with simple if statements, else if chains, and else blocks to control flow. See weather checks, hour evaluations, and greeting examples in action.

Explore switch statements in JavaScript, using an expression and cases with break statements and a default to handle invalid days; see examples of weekday and weekend outputs via console.log.

Master the ternary operator as a shorthand for if statements, using a condition, a question mark, and a colon to write concise one-liners in JavaScript and React.

Use prompts to collect load weights and options, convert inputs to numbers, and calculate laundromat costs in the console for the project.

Master for loops in JavaScript, covering initialization, condition, and increment, with string iteration using length and challenges on even numbers via modulus and if statements.

Explore while loops by coding with me, using HTML and JavaScript to run a block until a condition is met, with examples like password prompts and pyramid printing.

Print the odd numbers from 1 to 100 using a for loop with an if statement. Explore a no-if approach by incrementing the counter by two to skip evens.

Explore functions as blocks of code that execute when called, with or without parameters, and learn how to return values and call them from anywhere.

Create a function to convert fahrenheit to celsius using (f - 32) * 5/9 and return the result, then test with 32 to get 0 and 212 to get 100.

Write a reusable function that returns a random integer between 1 and 10 using math.random and math.floor, returning the value and logging it for challenges.

Learn hoisting in JavaScript: variables and function declarations move to the top of their scope, with var giving undefined when used early while let and const crash.

Create two dice roll variables for player one and player two using a prior random number function, then compare rolls with if/else to declare a winner or a draw.

Read user input from a readable stream with the readline module and write output to stdout, building an asynchronous start function that awaits a name and greets.

Explore JavaScript scope across global, block, and functional scopes; see how hoisting affects access, and practice debugging scope by inspecting where variables are defined.

Learn to build an input/output passphrase challenge using an asynchronous loop, prompting for a passphrase until correct, with success and retry messages.

Explore solving a field trip bus problem in JavaScript by creating two functions that calculate large (40-seat) and small (20-seat) buses using Math.floor, modulus, and ceiling.

Develop a terminal color guessing game in JavaScript that randomly selects a color and prompts user input via readline. Use loops and functions to manage guesses and an optional replay.

Learn how arrays in JavaScript are resizable objects with mixed data types, indexed from zero, support length, and can be iterated with a for loop and string interpolation.

Practice arrays of numbers by building a shopping cart, iterating with a for loop, and accumulating a total to compute a dynamic average. Format the result to two decimal places.

Explore accessing elements in arrays, including nested arrays, with zero-based indexing and bracket notation; learn about mixed data types and level-by-level access via console log.

Master array iteration in JavaScript using the for of loop, compare it with the traditional for loop, and explore fruit and vegetable examples with clear variable naming and logging.

Write a shuffle array function that uses a for loop, a temporary memory, and a generated random index to swap elements, returning a new shuffled array.