From 0d9b2899969929576a996e2c7d674867eb6eb9be Mon Sep 17 00:00:00 2001 From: "bobbym.moneyjr" Date: Tue, 31 Mar 2026 11:46:56 -0400 Subject: [PATCH 1/2] All parts together --- BobbyJScriptLab/lab.js | 157 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 BobbyJScriptLab/lab.js diff --git a/BobbyJScriptLab/lab.js b/BobbyJScriptLab/lab.js new file mode 100644 index 0000000..b917282 --- /dev/null +++ b/BobbyJScriptLab/lab.js @@ -0,0 +1,157 @@ +let fullName = "Amani Drummond"; + + +console.log(fullName.length); + + +console.log(fullName.toUpperCase()); + + +console.log(fullName.includes("Drummond")); + + +console.log(fullName.slice(0, 4)); + +// Mini Challenge: +function greet(name) { + return "Hello, " + name.toUpperCase() + "!"; +} + +console.log(greet("Amani")); + +// .length → Returns the number of elements in something. + +// .includes() → Checks if something contains a value. Returns true or false. + +// .slice() → Returns a portion (piece) of a string or array. + +// Create Variables +let num1 = 10; +let num2 = 3; + +// Math operations +let sum = num1 + num2; +let difference = num1 - num2; +let product = num1 * num2; +let quotient = num1 / num2; +let remainder = num1 % num2; + +// Round a decimal number +let roundedNumber = Math.round(4.6); + +// Random number between 1 and 10 +let randomNumber = Math.floor(Math.random() * 10) + 1; + +// Print results +console.log("Addition:", sum); +console.log("Subtraction:", difference); +console.log("Multiplication:", product); +console.log("Division:", quotient); +console.log("Remainder:", remainder); +console.log("Rounded number:", roundedNumber); +console.log("Random number (1-10):", randomNumber); + +// Mini Challenge +function checkEvenOrOdd(number) { + if (number % 2 === 0) { + return "Even"; + } else { + return "Odd"; + } +} + +// Test the function +console.log(checkEvenOrOdd(4)); // Even +console.log(checkEvenOrOdd(7)); // Odd + + + +// Check for Understanding + +//1. What does % do? +//% gives the remainder of a division operation. For example, 10 % 3 would return 1 because when you divide 10 by 3, the quotient is 3 with a remainder of 1. + +//2. What does Math.random() return? +//Math.random()` returns a random decimal number between 0 (inclusive) and 1 (exclusive). + +//3. When would you use Math.floor()? +//Math.floor() is used to round a decimal number down to the nearest integer. + +let students = ["Ben", "Adam", "Gary", "Lindsey"]; + +for (let i = 0; i < students.length; i++) { + console.log(students[i]); +} +//====== OR ===== +//for (let student of students) { +// console.log(student); +//} + + +students.push("Jeff"); +console.log("After adding:", students); + +students.pop(); +console.log("After removing:", students); + +console.log("Total students:", students.length); + +//Mini Challenge +function sumArray(numbers) { + let total = 0; + + for (let i = 0; i < numbers.length; i++) { + total += numbers[i]; + } + + return total; +} + +let nums = [1, 2, 3, 4, 5]; +console.log("Sum:", sumArray(nums)); + +//Do you understand??? + +//Question 1...How do you access an array element? +//Answer 1...using the index..ex: students[0] + +//Question 2...What does .push() do? +//Answer 2...it adds a new item to the end of your array + +//Question 3...Why do we use loops with arrays? +//Answer 3...an array can hold multiple values and loops allows you to go through each item + +let car = { + brand: "Toyota", + model: "Camry", + year: 2020, +} +console.log(car.brand); // Output: Toyota +console.log(car.model); // Output: Camry +console.log(car.year); // Output: 2020 + +car.year = 2024; +console.log("Updated year: ", car.year); + +car.color = "black"; +console.log("Car added: ", car.color); + +for (let key in car) { + console.log(key, car[key]); +} + +function describePerson(person) { + return person.name + " is " + person.age + " years old."; +} + +let bobby = { + name: "Bobby", + age: 24, +}; +console.log(describePerson(bobby)); + +/* +1. A key-value pair is a label (key) paired with its data (value). like name: "Bobby" +2. You access object data using dot notation (person.name) or bracket notation (person["name"]) +3. Use an object when data has named properties, use an array when data is a simple list +*/ \ No newline at end of file From b8ed6274c13055ad33003289b9673eb86744471b Mon Sep 17 00:00:00 2001 From: "bobbym.moneyjr" Date: Tue, 31 Mar 2026 12:00:31 -0400 Subject: [PATCH 2/2] Done --- BobbyJScriptLab/lab.js | 59 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 58 insertions(+), 1 deletion(-) diff --git a/BobbyJScriptLab/lab.js b/BobbyJScriptLab/lab.js index b917282..1c2af26 100644 --- a/BobbyJScriptLab/lab.js +++ b/BobbyJScriptLab/lab.js @@ -134,7 +134,7 @@ car.year = 2024; console.log("Updated year: ", car.year); car.color = "black"; -console.log("Car added: ", car.color); +console.log("Color added: ", car.color); for (let key in car) { console.log(key, car[key]); @@ -154,4 +154,61 @@ console.log(describePerson(bobby)); 1. A key-value pair is a label (key) paired with its data (value). like name: "Bobby" 2. You access object data using dot notation (person.name) or bracket notation (person["name"]) 3. Use an object when data has named properties, use an array when data is a simple list +*/ + +//Final Challenge: Student Grade Calculator +const student = { + name: "Amani", + scores: [80, 90, 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(avg) { + if (avg >= 90) { + return "A"; + } else if (avg >= 80) { + return "B"; + } else if (avg >= 70) { + return "C"; + } else if (avg >= 60) { + return "D"; + } else { + return "F"; + } +} + + +const average = calculateAverage(student.scores); +const grade = getGrade(average); + + +console.log("Name:", student.name); +console.log("Average:", Math.round(average)); +console.log("Grade:", grade); + +/* +At the bottom of your file, answer: + +Which data type felt easiest? +Which one was most confusing? +How do arrays and objects differ? +When would you use each in real applications? + +1. Strings felt easiest because they are straightforward and I use them often. +2.I definitely need more practice with arrays and objects, but I think objects are more confusing because they have more complex structures. +3. Arrays are ordered lists of values, while objects are collections of key-value pairs. Arrays are accessed by index, while objects are accessed by keys. +4. I would use arrays when I need to store a list of items, like a list of students or products. I would use objects when I need to represent more complex data with multiple properties, like a user profile or a car with various attributes. + */ \ No newline at end of file