Are you new to programming and looking for a way to test your skills and learn more about JavaScript? Look no further! Here are five challenges to get you started. These challenges are designed for beginners, but even experienced programmers may learn something new.

**Challenge #1:** Write a function that takes in two numbers and returns their sum.

This is a simple challenge to get you started with JavaScript functions. A function is a block of code that performs a specific task and can be reused multiple times in a program. To write a function that returns the sum of two numbers, you will need to use the `return`

keyword.

**Here is an example of a function that returns the sum of two numbers:**

```
function add(a, b) {
return a + b;
}
console.log(add(1, 2)); // Output: 3
console.log(add(5, 10)); // Output: 15
```

**Challenge #2:** Write a program that calculates the factorial of a number.

A factorial is the product of an integer and all the integers below it. For example, the factorial of 4 is 4 * 3 * 2 * 1 = 24.

To solve this challenge, you will need to use a loop, such as a `for`

loop or a `while`

loop. A `for`

the loop is a control flow statement that allows you to repeat a block of code a specific number of times.

**Here is an example of a program that calculates the factorial of a number using a for loop:**

```
function factorial(n) {
let result = 1;
for (let i = 1; i <= n; i++) {
result *= i;
}
return result;
}
console.log(factorial(4)); // Output: 24
console.log(factorial(5)); // Output: 120
```

## Challenge #3: Write a program that determines if a number is a prime.

A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. For example, 2, 3, 5, and 7 are prime numbers, but 4 is not (2 * 2 = 4).

To solve this challenge, you will need to use the modulo operator (`%`

). The modulo operator returns the remainder of a division operation. For example, `7 % 3`

returns 1.

**Here is an example of a program that determines if a number is prime:**

```
function isPrime(n) {
if (n < 2) return false;
for (let i = 2; i < n; i++) {
if (n % i === 0) return false;
}
return true;
}
console.log(isPrime(2)); // Output: true
console.log(isPrime(3)); // Output: true
console.log(isPrime(4)); // Output: false
console.log(isPrime(5)); // Output: true
```

## Challenge #4: Write a program that returns the Fibonacci sequence.

The Fibonacci sequence is a series of numbers in which each number is the sum of the two preceding ones, usually starting with 0 and 1. For example, the first 10 numbers in the Fibonacci sequence are 0, 1, 1, 2, 3, 5, 8, 13, 21, and 34.

To solve this challenge, you will need to use a `while`

loop. A `while`

loop is a control flow statement that allows you to repeat a block of code as long as a certain condition is true.

**Here is an example of a program that returns the Fibonacci sequence:**

```
function fibonacci(n) {
let a = 0, b = 1, result = [a, b];
while (result.length < n) {
[a, b] = [b, a + b];
result.push(b);
}
return result;
}
console.log(fibonacci(10)); // Output: [0, 1, 1, 2, 3, 5, 8, 13, 21, 34]
```

## Challenge #5: Write a program that sorts an array of numbers in ascending order.

To solve this challenge, you will need to use the `sort()`

method. The `sort()`

the method is a built-in method that allows you to sort the elements of an array in place.

**Here is an example of a program that sorts an array of numbers in ascending order:**

```
function sortNumbers(arr) {
return arr.sort((a, b) => a - b);
}
console.log(sortNumbers([5, 2, 1, 3, 4])); // Output: [1, 2, 3, 4, 5]
console.log(sortNumbers([10, 5, 8, 1, 7])); // Output: [1, 5, 7, 8, 10]
```

I hope these challenges have helped you learn more about JavaScript and improve your programming skills. Keep practicing and you’ll be a pro in no time!

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