Average Salary Challenge

In this challenge, I want you to create a function that will calculate the average salary of the salaries in the job listings.

In the sandbox file for this section, I added a spot to output the average salary. I also added a comment where you should add your function.

<div class="bg-green-100 rounded-lg shadow-md p-6 my-6">
 <h2 class="text-2xl font-semibold mb-4">Average Salary: <?php echo 'replace with your function call  ?></h2>
</div>

Here is the function signature:

function calculateAverageSalary($jobListings) {
    // Your code here
}

It will take in the entire $jobListings array. You will need to loop through the array and add up all of the salaries. Then you will need to divide that total by the number of salaries. Finally, you will need to return the average salary.

Hints

• You can use the count function to get the number of items in an array.
• You can either use the array_sum function in combination with array_column to add up the salaries or loop over the $jobListings array using a foreach loop and add up the salaries using the += operator.
• Use the formatSalary function that we created to format the average salary.

Click For Solution 1

function calculateAverageSalary($jobListings) {
  $totalSalary = 0;
  $count = count($jobListings);

  // Calculate the total salary
  foreach ($jobListings as $job) {
      $totalSalary += $job['salary'];
  }

  // Calculate the average salary
  $averageSalary = ($count > 0) ? $totalSalary / $count : 0;

  return formatSalary($averageSalary);
}

Explanation

• We initialize a $totalSalary variable to 0.
• We get the number of items in the $jobListings array using the count function and store it in a $count variable.
• We loop over the $jobListings array using a foreach loop.
• We add the salary of each job to the $totalSalary variable using the += operator.
• We calculate the average salary by dividing the $totalSalary by the $count variable.
• We return the average salary using the formatSalary function.

Click For Solution 2

function calculateAverageSalary($jobListings) {
  $salaries = array_column($jobListings, 'salary');
  $totalSalary = array_sum($salaries);
  $count = count($jobListings);

  // Calculate the average salary
  $averageSalary = ($count > 0) ? $totalSalary / $count : 0;

  return formatSalary($averageSalary);
}

Explanation

• We use the array_column function to get an array of all of the salaries.
• We use the array_sum function to add up all of the salaries.
• We get the number of items in the $jobListings array using the count function and store it in a $count variable.
• We calculate the average salary by dividing the $totalSalary by the $count variable.
• We return the average salary using the formatSalary function.