list separated by comma, but the last item must not have a comma

In laravel how do i separate each category with a comma, if there are many categories, the last item shouldnt have comma. . .

it should look like:

Job categories: category1, category2, category3, category4

Here is my code:

@if(count($job->categories) < 2)
     @foreach($job->categories as $category)
         {{ $category->name }}
     @endforeach
@else
     @foreach($job->categories as $category)
         {{ $category->name . ", " }}
     @endforeach
@endif

via Chebli Mohamed