how to declare variables that are within functions

app.get('/upload/:candid', function(req,res){

const candId = req.params.candid

let candidateArray =""

let statusArray = ""

let cand_id = " "

  Candidate.find({idno:candId},function(err,foundcandidate){

      if (err){
  
        console.log(err)
  
  
  
      }else{
  
        
  
      for (const [key, value] of Object.entries(foundcandidate)) {
  
        cand_id= `${value._id}`


        candidateArray=foundcandidate


        
        
        
          
        }
      }


})


Status.find({candidate:cand_id}, function(err, foundattachments){
  
  if (!err){

    statusArray = foundattachments



  }  else if (err){

    console.log(err)
  }

  



})




console.log(candidateArray)

how can i assign candudateArray within a function and access it outside that function

Read more here: https://stackoverflow.com/questions/66273314/how-to-declare-variables-that-are-within-functions