JavaScript Practice Assignments: Values and Variables

Assignment 1: Simple Variables and Console Output

Task:

1. Declare a variable name and assign it your name.
2. Declare a variable age and assign it your age.
3. Declare a constant favoriteColor and assign it your favorite color.
4. Print each of these values to the console using console.log().

Example Solution:

let name = 'John Doe';
let age = 25;
const favoriteColor = 'blue';

console.log('Name:', name);
console.log('Age:', age);
console.log('Favorite Color:', favoriteColor);

Assignment 2: Arithmetic Operations

Task:

1. Declare two variables, num1 and num2, and assign them numerical values.
2. Create variables for the sum, difference, product, and quotient of num1 and num2.
3. Print the results of these operations to the console.

Example Solution:

let num1 = 10;
let num2 = 5;

let sum = num1 + num2;
let difference = num1 - num2;
let product = num1 * num2;
let quotient = num1 / num2;

console.log('Sum:', sum);
console.log('Difference:', difference);
console.log('Product:', product);
console.log('Quotient:', quotient);

Assignment 3: Working with Strings

Task:

1. Declare a variable firstName and assign it your first name.
2. Declare a variable lastName and assign it your last name.
3. Concatenate firstName and lastName to create a new variable fullName.
4. Print fullName to the console.

Example Solution:

let firstName = 'John';
let lastName = 'Doe';

let fullName = firstName + ' ' + lastName;

console.log('Full Name:', fullName);

Assignment 4: Boolean Values and Conditions

Task:

1. Declare a variable isAdult and assign it a boolean value based on your age (true if 18 or older, false if younger).
2. Use an if-else statement to print “You are an adult.” if isAdult is true, and “You are not an adult.” if isAdult is false.

Example Solution:

let age = 25;
let isAdult = age >= 18;

if (isAdult) {
    console.log('You are an adult.');
} else {
    console.log('You are not an adult.');
}

Assignment 5: Arrays and Loops

Task:

1. Declare an array numbers containing five numerical values.
2. Use a for loop to iterate over the array and print each number to the console.

Example Solution:

let numbers = [1, 2, 3, 4, 5];

for (let i = 0; i < numbers.length; i++) {
    console.log('Number:', numbers[i]);
}

Assignment 6: Objects and Properties

Task:

1. Create an object person with properties name (your name), age (your age), and favoriteColor (your favorite color).
2. Print each property of the person object to the console.

Example Solution:

let person = {
    name: 'John Doe',
    age: 25,
    favoriteColor: 'blue'
};

console.log('Name:', person.name);
console.log('Age:', person.age);
console.log('Favorite Color:', person.favoriteColor);

Assignment 7: Functions

Task:

1. Write a function greet that takes one parameter name and prints “Hello, [name]!” to the console.
2. Call the greet function with your name as the argument.

Example Solution:

function greet(name) {
    console.log('Hello, ' + name + '!');
}

greet('John Doe');

Assignment 8: Updating Variables

Task:

1. Declare a variable count and initialize it with 0.
2. Create a function increment that increases the value of count by 1 and prints the new value to the console.
3. Call the increment function three times.

Example Solution:

let count = 0;

function increment() {
    count++;
    console.log('Count:', count);
}

increment(); // Count: 1
increment(); // Count: 2
increment(); // Count: 3

Assignment 9: Conditional Logic

Task:

1. Declare a variable score and assign it a numerical value.
2. Write a function grade that prints “Pass” if the score is 50 or higher, and “Fail” otherwise.
3. Call the grade function with the score variable as an argument.

Example Solution:

let score = 65;

function grade(score) {
    if (score >= 50) {
        console.log('Pass');
    } else {
        console.log('Fail');
    }
}

grade(score);

Assignment 10: Combining Data Types

Task:

1. Declare a variable students as an array of objects, where each object represents a student with properties name and age.
2. Use a for loop to iterate over the array and print each student’s name and age to the console.

Example Solution:

let students = [
    { name: 'Alice', age: 20 },
    { name: 'Bob', age: 22 },
    { name: 'Charlie', age: 23 }
];

for (let i = 0; i < students.length; i++) {
    console.log('Name:', students[i].name);
    console.log('Age:', students[i].age);
}

By completing these assignments, you’ll gain practical experience with values, variables, and basic operations in JavaScript. Feel free to modify and expand these examples to further enhance your understanding!