JS Check for all Odd occurrences of an integer.

allOccurenceOfInt.js

function findOdd(A) {
  var num;
    var count = 0;
    for(i=0;i<A.length;i++){
       num = A[i]
       for(a=0;a,a<A.length;a++){
          if(A[a]==num){
          count++;
          }
     } if(count%2!=0){
          return num;
     }
   }
}