π Dive Into the World of JavaScript Loops! π
Whether you’re a novice programmer or honing your skills, mastering JavaScript loops is a game-changer! They’re not just a fundamental part of programming, but they’re the heartbeat of many scripts and functions you’ll write in your development career.
I’ve compiled a collection of JavaScript exercises that span from basic loop structures like `for` and `while`, to more nuanced uses like nested loops and using `break` and `continue`. Whether it’s printing patterns, iterating arrays, or performing cumulative calculations, these tasks are designed to bolster your understanding and control flow mastery.
Why Loop Exercises? π€
– They sharpen problem-solving and logical thinking.
– Understanding loops is crucial for data manipulation and DOM scripting.
– Enhances your ability to automate repetitive tasks efficiently.
Tackle these challenges, share your solutions, or discuss your approaches. Let’s turn the complexity of loops into coding proficiency. Every line of code you write brings a new learning opportunity!
Feel free to share insights, ask questions, or propose new loop-related challenges. Letβs grow together in our JavaScript journey! #JavaScript #CodingExercises #WebDevelopment #Programming
Keep Looping! βΏ
JavaScript Loops
Exercise 1: Basic For Loop
Problem: Print numbers 1 through 10 using a for loop.
Explanation: This exercise demonstrates the basic structure of a for loop, which includes initialization, condition, and increment sections.
Code:
for (let i = 1; i <= 10; i++) {
console.log(i);
}
Exercise 2: For Loop Array Iteration
Problem: Iterate over an array containing [“apple”, “banana”, “cherry”] and print each fruit.
Explanation: This exercise shows how to use a for loop to iterate through an array’s elements.
Code:
let fruits = [“apple”, “banana”, “cherry”];
for (let i = 0; i < fruits.length; i++) {
console.log(fruits[i]);
}
Exercise 3: While Loop Basics
Problem: Use a while loop to print numbers from 5 to 15.
Explanation: This exercise introduces the while loop, which continues to execute a block of code as long as a specified condition is true.
Code:
let i = 5;
while (i <= 15) {
console.log(i);
i++;
}
Exercise 4: Do-While Loop
Problem: Implement a do-while loop to print “Hello, World!” 5 times.
Explanation: Unlike the while loop, a do-while loop will execute the block of code once before checking if the condition is true, then it will repeat the loop as long as the condition is true.
Code:
let count = 0;
do {
console.log(“Hello, World!”);
count++;
} while (count < 5);
Exercise 5: Breaking Out of a Loop
Problem: Use a for loop to print numbers from 1 to 10. Exit the loop when the loop index is 6 using the break statement.
Explanation: The break statement can be used to exit a loop before it has looped through all items.
Code:
for (let i = 1; i <= 10; i++) {
if (i === 6) {
break;
}
console.log(i);
}
Exercise 6: Continue in a Loop
Problem: Use a for loop to print all numbers from 1 to 10 except for 4.
Explanation: The continue statement skips one iteration in the loop.
Code:
for (let i = 1; i <= 10; i++) {
if (i === 4) {
continue;
}
console.log(i);
}
Exercise 7: Nested Loops
Problem: Print a 5×5 grid of asterisks using nested for loops.
Explanation: This exercise demonstrates using one loop inside another to generate a grid pattern.
Code:
for (let i = 0; i < 5; i++) {
let row = ”;
for (let j = 0; j < 5; j++) {
row += ‘* ‘;
}
console.log(row.trim());
}
Exercise 8: Looping Backwards
Problem: Use a for loop to print the numbers 10 down to 1 in reverse order.
Explanation: Looping backwards requires setting the loop’s starting condition to the maximum and decrementing the loop variable.
Code:
for (let i = 10; i > 0; i–) {
console.log(i);
}
Exercise 9: Sum Numbers
Problem: Write a loop that sums numbers from 1 to 100.
Explanation: This shows how to accumulate a total within a loop.
Code:
let sum = 0;
for (let i = 1; i <= 100; i++) {
sum += i;
}
console.log(sum);
Exercise 10: Factorial Calculation
Problem: Write a function that calculates the factorial of a number using a loop.
Explanation: This demonstrates using a loop within a function to perform a calculation that requires repetitive operations.
Code:
function factorial(n) {
let result = 1;
for (let i = 2; i <= n; i++) {
result *= i;
}
return result;
}
console.log(factorial(5)); // Outputs: 120