Glenn JavaScript intro

lab.js

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+let name = "Glenn Tyson";
+let age = 31; 
+let favoriteColor = "Blue";
+let likesCoding = true;
+// What is a variable?
+// A variable is a container used to store data that can be used later in a program.
+
+// What is the difference between let and const?
+// let allows you to change (reassign) the value later.
+// const does not allow reassignment; the value stays constant.
+
+// What does console.log() do?
+// console.log() prints output to the console so you can see values or debug your code.
+
+console.log("Name:", name);
+console.log("Age:", age);
+console.log("Favorite Color:", favoriteColor);
+console.log("Likes Coding:", likesCoding);
+
+let temperature= 85;
+
+if (temperature >= 60) {
+  console.log("It is warm.");
+} else {
+  console.log("It is cold.");
+}
+let password="javascript123";
+
+
+if (password==="javascript123") {
+  console.log("Access granted");
+} else {
+  console.log("Access denied");
+}
+
+let hour = 2;
+
+if (hour < 12) {
+  console.log("Good morning");
+} else if (hour >= 12 && hour <= 17) {
+  console.log("Good afternoon");
+} else {
+  console.log("Good evening");
+}
+// What is the purpose of an if statement?
+// An if statement is used to run code only when a certain condition is true.
+
+// When would you use else if?
+// You use else if when you have multiple conditions to check after the first if.
+
+// What does === check for?
+// === checks for strict equality, meaning both value AND data type must be the same.
+
+function sayHello() {
+  console.log("Hello!");
+}
+let food ="Pizza";
+function favoriteFood(food) {
+  console.log("My favorite food is " + food + ".");
+}
+function multiply(num1, num2) {
+  return num1 * num2;
+}
+
+function isEven(number) {
+  return number % 2 === 0;
+}
+sayHello();
+favoriteFood("Pizza");
+console.log(multiply(2, 3));
+console.log(isEven(6));
+
+// Why are functions useful?
+// Functions are useful because they allow you to reuse code, keep your program organized, 
+// and make it easier to manage and update.
+
+// What is a parameter?
+// A parameter is a variable inside a function that receives a value when the function is called.
+
+// What is the difference between console.log() and return?
+// console.log() prints a value to the console.
+// return sends a value back from a function so it can be stored or used later.
+
+for (let i = 1; i <= 10; i++) {
+  console.log(i);
+}
+for (let i = 2; i <= 20; i += 2) {
+  console.log(i);
+}
+let i = 5;
+
+while (i >= 1) {
+  console.log(i);
+  i--;
+}
+for (let i = 1; i <= 5; i++) {
+  console.log("Practice makes progress");
+}
+// What is a loop used for?
+// A loop is used to repeat a block of code multiple times until a condition is met.
+
+// When might you use a for loop?
+// You would use a for loop when you know how many times you want the code to run.
+
+// What could happen if a loop condition never becomes false?
+// It would create an infinite loop, causing the program to run forever and possibly crash or freeze.
+
+//Mini 1
+function checkNumber(num) {
+  if (num > 0) {
+    console.log("The number is positive");
+  } else if (num < 0) {
+    console.log("The number is negative");
+  } else {
+    console.log("The number is zero");
+  }
+}
+
+
+checkNumber(5);
+checkNumber(-3);
+checkNumber(0);
+//Mini 2
+function countdown(num) {
+  for (let i = num; i >= 1; i--) {
+    console.log(i);
+  }
+}
+
+
+countdown(5);
+
+
+
+let studentName = "Glenn";
+let score = 85;
+//Mini 3
+function checkProgress(score) {
+  if (score >= 90) {
+    console.log("Excellent work");
+  } else if (score >= 75) {
+    console.log("Good job");
+  } else {
+    console.log("Keep practicing");
+  }
+}
+
+
+checkProgress(score);
+
+//Mini 4
+let students = ["Glenn", "Mason", "Cory", "Mesheik", "Amani"];
+
+for (let i = 0; i < students.length; i++) {
+  console.log(students[i]);
+}
+
+
+//Strech 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(gradeCalculator(85));
+
+//Stretch 2
+
+for (let i = 1; i <= 30; i++) {
+  if (i % 3 === 0) {
+    console.log(i);
+  }
+}
+
+//Stretch 3
+function printName(name, times) {
+  for (let i = 0; i < times; i++) {
+    console.log(name);
+  }
+}
+
+
+printName("Glenn", 5);
+
+//Stretch 
+function oddOrEven(number) {
+  if (number % 2 === 0) {
+    return "Even";
+  } else {
+    return "Odd";
+  }
+}
+
+for (let i = 0; i < 10; i++) {
+  console.log(oddOrEven(7)); 
+}
+
+// Reflection Questions
+
+// Which topic felt easiest for you?
+// Variables were the easiest because they just store values.
+
+// Which topic felt most challenging?
+// Loops were the hardest because it can be confusing when they stop.
+
+// How do variables, conditionals, functions, and loops work together in a program?
+// Variables store data, conditionals make choices, functions run code, and loops repeat things.
+
+// What is one question you still have about JavaScript?
+// How do all of these work together in bigger programs?