I am using laravel and I got this error. What I want to achieve is getting coordinator id and display it to input coordinatorname. I am using for loop to get the data but it gives error about constant 'i'. Does anyone know how to fix this?

This is my Javascript code:

function defaultcoor(course)
 {
  for(let i=0; i < {{ count($codes) }}; i++)
   {
       for(let j=0;j < {{ count($coordinators) }}; j++)
       {
          if(course ==  {{ $codes[i]->id }}  &&  {{ $coordinators[j]->staffid }} == {{ $codes[i]->coordinator_id }})
          {
            document.getElementById("coordinatorname").value = $coordinators[j]->id;
          }
       }
   }
 }