getValueGrade

function getValueGrade(grade) {
  var result = [];
   for (var i = 0; i < grade.length; i++){
      if( grade[i] == "A"){
        result[i] = 4;
      }else if(grade[i] =="B+"){
        result[i] =  3.5;
      }else if(grade[i] =="B"){
        result[i] =  3;
      }else if(grade[i] == "C+"){
        result[i] = 2.5;
      }else if(grade[i] == "C"){
        result[i] =  2;
      }else if(grade[i] == "D+"){
        result[i] = 1.5;
      }else if(grade[i] == "D"){
        result[i] = 1;
      }else{
       result[i] =  0;
      }
    }
  return result;
}