Henrrietta's completed JavaScript intro Lab 2

js-data-types-lab/lab.js

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+
+//Practie 1: String Maniupulation
+
+let fullName = "Henrrietta Riverson"
+
+console.log(fullName.length);
+console.log(fullName.toUpperCase());
+console.log(fullName.includes("Riverson"));
+let firstName = fullName.slice(0, fullName.indexOf(" "));
+console.log(firstName);
+
+//Mini Challenge
+function greet(name){
+    return "Hello, " + name.toUpperCase() + "!";
+}
+
+console.log(greet("Henrrietta"));
+
+/* Check for Understanding 
+1. What does .length do?
+    - It returns the number of characters in a string, including the space.
+2. What does .includes return?
+    - It returns true if the specified string is found within the original string, and false if it is not.
+3. What does .slice do?
+    - It extracts a section of a string and returns it as a new string without modifying the original string.
+*/
+
+//Practice 2: Number Logic 
+ let num1 = 10;
+ let num2 = 3;
+
+ console.log(num1 + num2);
+ console.log(num1 - num2);
+ console.log(num1 * num2);
+ console.log(num1 / num2);
+ console.log(num1 % num2);
+ console.log(Math.round(num1 / num2));
+ console.log(Math.random(1,10));
+
+ // Mini Challenge 
+ function isEven(num){
+    if(num % 2 === 0){
+        return "Even";
+    }
+    else{
+        return "Odd";
+    }
+ }
+
+ console.log(isEven(10));
+
+ //Check for Understanding 
+ /* 
+ 1. What does % do?
+    - It returns the remainder of a division operation.
+2. What does Math.random() return?
+    - It generates a random decimal number between 0 (inclusive) and 1 (exclusive).
+3. When would you use Math.floor()?
+    - You would use Math.floor() when you want to round a number down to the nearest whole number. 
+ */
+
+//Part 3: Arrays 
+let students = ["A", "B", "C", "D"];
+
+for(let i = 0; i < students.length; i++){
+    console.log(students[i]);
+}
+
+students.push("E");
+console.log(students);
+students.pop()
+console.log(students);
+console.log(students.length);
+
+//Mini Challenge
+function arrSum(arr){
+    let sum = 0;
+    for(let i = 0; i < arr.length; i++){
+        sum += arr[i];
+    }
+    return sum;
+}
+
+console.log(arrSum([1,2,3,4,5]));
+
+// Check for Understanding
+/*
+1. How do you access an array element?
+    - You can access an array element by using the square bracket notation with the index of the element you want to access. 
+2. What does .push() do?
+    - It adds a new element to the end of an array.
+3. Why do we use loops with arrays?
+    - We use loops with arrays to iterate through each element in the array and perform a specific action on each element.
+*/
+
+//Part 4: Objects 
+let car = {
+  brand: "Toyota",
+  model: "Camry",
+  year: 2020
+};
+
+console.log(car.brand);
+console.log(car.model);
+console.log(car.year);
+car.year = 2021;
+console.log(car.year);
+car.color = "red";
+
+for (let key in car) {
+  console.log(key + ": " + car[key]);
+}
+
+//Mini Challenge 
+function describePerson(person) {
+    return person.name + " is " + person.age + " years old";
+}
+
+let person1 = { name: "Henrrietta", age: 20 };
+console.log(describePerson(person1));
+
+//Check for Understanding
+/*
+1. What is a key-value pair?
+    - A key-value pair is a set of two linked data items: a key, which is a unique identifier, and a value, which is the data associated with that key.
+2. How do you access an object data?
+    - You can access an object data using dot notation (object.key) or bracket notation (object["key"]).
+3. When would you use an object instead of an array?
+    - You would use an object instead of an array when you want to store data in 
+    a structured way with named properties, rather than just a list of values. 
+*/
+
+
+//Final Challenge: Combine Everything 
+let student = {
+    name: "Henrrietta",
+    scores: [60, 86, 75, 100]
+};
+
+function calculateAverage(scores) {
+    let total = 0;
+    for (let i = 0; i < scores.length; i++) {
+        total += scores[i];  
+    }
+    return total / scores.length; 
+}
+
+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";
+    }
+}
+
+// Calculate average and grade
+let average = calculateAverage(student.scores);
+let grade = getGrade(average);
+
+// Print results
+console.log("Name:", student.name);
+console.log("Average:", average);
+console.log("Grade:", grade);
+