Completed all tasks for unit 01.

src/01-0-basics.js

@@ -3,11 +3,16 @@
  */
 
 // 1. Define three string variables firstName, middleName, and lastName.
+var firstName = "Sung-Duk";
+var middleName = "Duck";
+var lastName = "Kang";
 
 // 2. Declare a function named logFullName that takes no arguments.
 function logFullName() {
   // 3. Using template literals, create another variable fullName that combines all three names.
   // 4. Print the fullName to the console.
+  var fullName = `${firstName} ${middleName} ${lastName}`;
+  console.log(fullName);
 }
 
 /**
@@ -17,10 +22,16 @@ function logFullName() {
 // 1. Declare a variable named age and assign it a number.
 // 2. Declare a variable named isStudent and assign it a boolean value.
 // 3. Declare a variable named courses and assign it an array containing three string values representing courses e.g. "Math", "Science", "History".
+var age = 29;
+var isStudent = true;
+var courses = ["Math", "Science", "History"];
 
 // 4. Declare a function named logVariableTypes that takes no arguments.
 function logVariableTypes() {
   // 5. Print the type of each variable using the typeof operator.
+  console.log(typeof(age));
+  console.log(typeof(isStudent));
+  console.log(typeof(courses));
 }
 
 /**
@@ -30,26 +41,35 @@ function logVariableTypes() {
 // 1. Using var, declare a variable named school and assign it a value of "Hogwarts".
 // 2. Using let, declare a variable named subject and assign it a value of "Potions".
 // 3. Using const, declare a variable named professor and assign it a value of "Snape".
+var school = "Hogwarts";
+let subject = "Potions";
+const professor = "Snape";
 
 /**
  * Task 4: Basic Operators
  */
 
 // 1. Declare two variables x and y with values 5 and 10 respectively.
+let x = 5;
+let y = 10;
 
 function logAddition() {
   // 2. Log the sum of x and y.
+  console.log(x + y);
 }
 function logSubtraction() {
   // 3. Log the x subtracted from y
+  console.log(y - x);
 }
 
 function logMultiplication() {
   // 4. Log the product of x and y.
+  console.log(x * y);
 }
 
 function logDivision() {
   // 5. Log the quotient when x is divided by y.
+  console.log(x / y);
 }
 
 /**
@@ -64,4 +84,6 @@ let result2 = (3 + 4) * 5;
 
 function logResults() {
   // 3. Log both result values in your JavaScript environment and check your answers.
+  console.log(result1);
+  console.log(result2);
 }

src/01-1-basics.js

@@ -3,12 +3,24 @@
  */
 
 // Define a variable named studentGrade that is of type number.
+let studentGrade = 95;
 
 function gradeCommentary() {
   // 1. If studentGrade is above or equal to 90, log "Excellent work!".
   // 2. If studentGrade is between 80 and 89 (inclusive), log "Good job!".
   // 3. If studentGrade is between 70 and 79 (inclusive), log "You passed.".
   // 4. If studentGrade is below 70, log "Needs improvement.".
+  let comment = "";
+  if (studentGrade >= 90) {
+    comment = "Excellent work!";
+  } else if (studentGrade <= 89 && studentGrade >= 80) {
+    comment = "Good job!";
+  } else if (studentGrade <= 79 && studentGrade >= 70) {
+    comment = "You passed.";
+  } else {
+    comment = "Needs improvement."
+  }
+  console.log(comment);
 }
 
 /**
@@ -17,10 +29,20 @@ function gradeCommentary() {
 
 function logNumbers() {
   // 1. Log numbers from 1 to 10 using a for loop.
+  for (let i = 1; i <= 10; i++) {
+    console.log(i);
+  }
 }
 
 function countByTwos() {
   // 2. Using a while loop, log even numbers from 2 to 20.
+  let i = 2;
+  while (i <= 20) {
+    if (i % 2 == 0) {
+      console.log(i);
+    }
+    i += 2;
+  }
 }
 
 function triangle() {
@@ -34,6 +56,10 @@ function triangle() {
     ######
     #######
   */
+  const char = "#";
+  for (let i = 1; i <= 7; i++) {
+    console.log(char.repeat(i));
+  }
 }
 
 /**
@@ -43,11 +69,19 @@ function triangle() {
 // 1. Declare a function named calculateArea that takes two arguments: length and width. It should return the area of a rectangle.
 function calculateArea(length, width) {
   // Your code here
+  const area = length * width;
+  if (area < 0) {
+    return NaN;
+  } else {
+    return area;
+  }
 }
 
 // 2. Declare a function expression named greetPerson that takes a name as an argument and logs a greeting.
 var greetPerson = function (name) {
   // Your code here
+  const greeting = `Hello, ${name}!`;
+  console.log(greeting);
 };
 
 /**
@@ -57,19 +91,27 @@ var greetPerson = function (name) {
 // 1. Declare an object named book with properties: title, author, and year.
 var book = {
   // Your properties here
+  title: "Lord of the Rings",
+  author: 'J.R.R. Tolkin',
+  year: 1932
 };
 
 // 2. Log the book's title.
 function logBookTitle() {
   // Your code here
+  console.log(book.title)
 }
 
 // 3. Update the book's year to the current year.
 function updateYear() {
   // Your code here
+  const today = new Date();
+  const currYear = today.getFullYear()
+  book.year = currYear;
 }
 
 // 4. Add a new property to the book: genre, and assign it a value.
 function addGenre() {
   // Your code here
+  book.genre = 'Fiction'
 }

src/01-2-basics.js

@@ -13,4 +13,16 @@ function generateBandName(clothingColor, lastFoodEaten) {
   // Initialize bandName to an empty string
   // Function to capitalize the first letter of each word
   // Construct the band name
+  let bandName = "";
+  const color = clothingColor ? capitalize(clothingColor + "") : "";
+  const food = lastFoodEaten ? capitalize(lastFoodEaten + "") : "";
+  bandName = `The ${color} ${food}`;
+  return bandName;
 }
+
+// Takes in a word as a string and returns it with the first letter capitalized and
+// the rest lower case.
+function capitalize(word) {
+  if (!word.length) return;
+  return word.charAt(0).toUpperCase() + word.substring(1).toLowerCase();
+}