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Question 1:

You've been tasked with implementing a function that calculates the factorial of a given number. Write a JavaScript function called `calculateFactorial` that takes an integer as input and returns its factorial.

Solution 1:

```javascript
function calculateFactorial(num) {
if (num === 0 || num === 1) {
return 1;
} else {
let factorial = 1;
for (let i = 2; i <= num; i++) {
factorial *= i;
}
return factorial;
}
}

// Example usage:
console.log(calculateFactorial(5)); // Output: 120
```

Explanation 1:

In this solution, we first handle the base cases where the input number is either 0 or 1, in which case the factorial is always 1. For any other positive integer, we use a loop to multiply each number from 2 to the input number to calculate the factorial.

Question 2:

You're building a web application that requires validating email addresses entered by users. Implement a JavaScript function called `validateEmail` that takes an email address as input and returns `true` if the email is valid and `false` otherwise. Assume that a valid email address follows the standard format of `[email protected]`.

Solution 2:

```javascript
function validateEmail(email) {
const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
return emailRegex.test(email);
}

// Example usage:
console.log(validateEmail('[email protected]')); // Output: true
console.log(validateEmail('invalid-email')); // Output: false
```

Explanation 2:

In this solution, we use a regular expression to define the standard format of a valid email address. The regex pattern `/^[^\s@]+@[^\s@]+\.[^\s@]+$/` ensures that the email consists of a username, followed by the '@' symbol, a domain, and a valid extension. The `test()` method then checks if the input email matches this pattern, returning `true` if it does and `false` otherwise.

Conclusion

Mastering JavaScript assignments requires not only understanding the syntax but also developing problem-solving skills. By leveraging expert solutions like the ones provided above, you can tackle even the most challenging coding tasks with confidence. At ProgrammingHomeworkHelp.com, we're dedicated to helping you succeed in your JavaScript journey. So, the next time you find yourself struggling with a JavaScript assignment, remember, we're here to assist you every step of the way.