Mesheik's Javascript Intro 2 done

js-data-types-lab/lab.js

@@ -0,0 +1,151 @@
+//Part 1 Strings 
+
+let fullName = "Mesheik Brown";
+let firstName = "Mesheik";
+let lastName = "Brown";
+
+console.log(fullName.length);
+console.log(fullName.toUpperCase());
+console.log(fullName.includes("Brown"));
+console.log(fullName.slice(0, 7));
+
+
+//1.What does .length do?
+//AW: .length returns the number of characters in a string, including spaces and punctuation. 
+
+//2.What does .includes() return?
+//AW: .includes() returns a boolean value indicating whether a string contains another string.
+
+//3.What does .slice() do?
+//AW: .slice() extracts a section of a string and returns it as a new string.
+
+
+//Part 2 Numbers
+
+let num1 = 10;
+let num2 = 5;
+
+console.log(num1 + num2);
+console.log(num1 - num2);
+console.log(num1 * num2);
+console.log(num1 / num2);
+console.log(num1 % num2);
+
+console.log(Math.round(3.14));
+console.log(Math.floor(Math.random() * 10) + 1); //Random number between 1 and 10
+
+//1.What does % do?
+//AW: % returns the remainder of a division operation.
+
+//2.What does Math.random() return?
+//AW: Math.random() returns a random decimal number between 0 (inclusive) and 1 (exclusive).
+
+//3.When would you use Math.floor()?
+//AW: Math.floor() is used to round a decimal number down to the nearest integer.
+
+//Part 3 Arrays
+
+let students = ["A", "B", "C", "D"];
+
+// Print all students
+for (let i = 0; i < students.length; i++) {
+  console.log("Student:", students[i]);
+}
+
+// Add a new student
+students.push("E");
+console.log("After push:", students);
+
+// Remove the last student
+students.pop();
+console.log("After pop:", students);
+
+// Print total number of students
+console.log("Total students:", students.length);
+
+// 1. How do you access an array element?
+// AW: You access an array element by using its index, like array[0].
+
+// 2. What does .push() do?
+// AW: .push() adds a new item to the end of an array.
+
+// 3. Why do we use loops with arrays?
+// AW: We use loops with arrays so we can go through each item one by one.
+
+//Part 4 Objects
+
+let car = {
+  brand: "Toyota",
+  model: "Camry",
+  year: 2020
+};
+
+// Print each property
+console.log("Brand:", car.brand);
+console.log("Model:", car.model);
+console.log("Year:", car.year);
+
+// Update the year
+car.year = 2024;
+
+// Add a new property (color)
+car.color = "Black";
+
+console.log("Updated car object:", car);
+
+// Loop through the object
+for (let key in car) {
+  console.log(key + ":", car[key]);
+}
+
+//Final Challenge 
+
+let student = {
+  name: "John",
+  scores: [80, 90, 75, 100]
+};
+
+// Function to calculate average
+function calculateAverage(scores) {
+  let total = 0;
+
+  for (let i = 0; i < scores.length; i++) {
+    total += scores[i];
+  }
+
+  return total / scores.length;
+}
+
+// Function to determine grade
+function getGrade(average) {
+  if (average >= 90) {
+    return "A";
+  } else if (average >= 80) {
+    return "B";
+  } else if (average >= 70) {
+    return "C";
+  } else if (average >= 60) {
+    return "D";
+  } else {
+    return "F";
+  }
+}
+
+let averageScore = calculateAverage(student.scores);
+let grade = getGrade(averageScore);
+
+console.log("Name:", student.name);
+console.log("Average:", averageScore);
+console.log("Grade:", grade);
+
+// Which data type felt easiest?
+// AW: Strings felt easiest because the methods were simple to understand and test.
+
+// Which one was most confusing?
+// AW: Objects were the most confusing at first because I had to remember keys and how to loop through them.
+
+// How do arrays and objects differ?
+// AW: Arrays store lists of values in order, while objects store data with named properties.
+
+// When would you use each in real applications?
+// AW: I would use arrays for lists like scores, products, or messages. I would use objects for storing details about one thing, like a user, car, or student profile.