// JavaScript Introduction Lab

// Student Name: Kenneth Edelin

// ==================================================

// Part 1: Variables

// ==================================================

// Practice 1: Create Variables

let userName = "Kenneth Edelin";

let age = 26;

let favoriteColor = "Blue";

let likesCoding = true;

// Print variables

console.log("Name:", userName);

console.log("Age:", age);

console.log("Favorite Color:", favoriteColor);

console.log("Likes Coding:", likesCoding);

// Check for Understanding

// What is a variable?

// A variable is a named container that stores data.

// What is the difference between let and const?

// let can be changed later, const cannot be reassigned.

// What does console.log() do?

// console.log() prints information to the console.

// ==================================================

// Part 2: Conditionals

// ==================================================

// Task A

let temperature = 72;

if (temperature < 60) {

console.log("It is cold.");

} else {

console.log("It is warm.");

}

// Task B

let password = "javascript123";

if (password === "javascript123") {

console.log("Access granted");

} else {

console.log("Access denied");

}

// Task C

let hour = 15;

if (hour < 12) {

console.log("Good morning");

} else if (hour >= 12 && hour <= 17) {

console.log("Good afternoon");

} else {

console.log("Good evening");

}

// Check for Understanding

// What is the purpose of an if statement?

// An if statement helps a program make decisions based on conditions.

// When would you use else if?

// You use else if when you want to check another condition after the first one is false.

// What does === check for?

// It checks if two values are exactly equal in both value and type.

// ==================================================

// Part 3: Functions

// ==================================================

// Task A

function sayHello() {

console.log("Hello, welcome to JavaScript!");

}

sayHello();

// Task B

function favoriteFood(food) {

console.log("My favorite food is " + food + ".");

}

favoriteFood("pizza");

// Task C

function multiply(num1, num2) {

return num1 * num2;

}

let product = multiply(6, 7);

console.log("Product:", product);

// Task D

function isEven(number) {

return number % 2 === 0;

}

console.log("Is 8 even?", isEven(8));

console.log("Is 5 even?", isEven(5));

// Check for Understanding

// Why are functions useful?

// Functions are useful because they let you reuse code instead of repeating it.

// What is a parameter?

// A parameter is a value a function receives to work with.

// What is the difference between console.log() and return?

// console.log() prints a value, while return sends a value back from the function.

// ==================================================

// Part 4: Loops

// ==================================================

// Task A

for (let i = 1; i <= 10; i++) {

console.log(i);

}

// Task B

for (let i = 2; i <= 20; i += 2) {

console.log(i);

}

// Task C

let count = 5;

while (count >= 1) {

console.log(count);

count--;

}

// Task D

for (let i = 1; i <= 5; i++) {

console.log("Practice makes progress");

}

// Check for Understanding

// What is a loop used for?

// A loop is used to repeat code multiple times.

// When might you use a for loop?

// You use a for loop when you know how many times you want to repeat something.

// What could happen if a loop condition never becomes false?

// The loop could run forever and create an infinite loop.

// ==================================================

// Part 5: Combine Everything

// ==================================================

// Mini Challenge 1: Number Checker

function numberChecker(number) {

if (number > 0) {

console.log(number + " is positive.");

} else if (number < 0) {

console.log(number + " is negative.");

} else {

console.log(number + " is zero.");

}

}

numberChecker(10);

numberChecker(-3);

numberChecker(0);

// Mini Challenge 2: Countdown Function

function countdown(startNumber) {

let current = startNumber;

while (current >= 1) {

console.log(current);

current--;

}

}

countdown(5);

// Mini Challenge 3: Student Progress Checker

let studentName = "Kenneth Edelin";

let score = 88;

function checkStudentProgress(name, studentScore) {

if (studentScore >= 90) {

console.log(name + ": Excellent work");

} else if (studentScore >= 75) {

console.log(name + ": Good job");

} else {

console.log(name + ": Keep practicing");

}

}

checkStudentProgress(studentName, score);

// Mini Challenge 4: Class Roster

let student1 = "Kenneth";

let student2 = "Jordan";

let student3 = "Taylor";

let student4 = "Chris";

let student5 = "Morgan";

let roster = [student1, student2, student3, student4, student5];

for (let i = 0; i < roster.length; i++) {

console.log("Student:", roster[i]);

}

// ==================================================

// Stretch Challenges

// ==================================================

// Stretch 1

function gradeCalculator(score) {

if (score >= 90 && score <= 100) {

return "A";

} else if (score >= 80) {

return "B";

} else if (score >= 70) {

return "C";

} else if (score >= 60) {

return "D";

} else {

return "F";

}

}

console.log("Grade:", gradeCalculator(93));

console.log("Grade:", gradeCalculator(76));

console.log("Grade:", gradeCalculator(58));

// Stretch 2

for (let i = 1; i <= 30; i++) {

if (i % 3 === 0) {

console.log(i);

}

}

// Stretch 3

function printNameTimes(name, times) {

for (let i = 1; i <= times; i++) {

console.log(name);

}

}

printNameTimes("Kenneth Edelin", 3);

// Stretch 4

function oddOrEvenRepeated(number) {

let result;

if (number % 2 === 0) {

result = number + " is even.";

} else {

result = number + " is odd.";

}

for (let i = 1; i <= 10; i++) {

console.log(result);

}

}

oddOrEvenRepeated(7);

// ==================================================

// Reflection Questions

// ==================================================

// Which topic felt easiest for you?

// Variables felt easiest because they are simple containers for storing information.

// Which topic felt most challenging?

// Functions and loops together can be challenging because they require more planning.

// How do variables, conditionals, functions, and loops work together in a program?

// Variables store data, conditionals make decisions, functions organize reusable code,

// and loops repeat actions when needed.

// What is one question you still have about JavaScript?

// How do arrays and objects work in bigger JavaScript programs?