如何根据其他变量的结果设置变量名

Question

 var my_obj = {};
 var my_array = [];   

var j= "10";
  var k = "5";
  var subject = "10";
  var klass = "Math";

for (i= 1; i< j; i++) {
for (k = 0; c < k; k++) {   
   if (k== 1) {
    var first = "hello" + row;
     }
    if (k== 2) {
     var second = subject + k;  //var hello1 =  subject + k; -- I would like to have "hello1" which is here the first variable value!
     }
    if (k==3) {
    var hello2 = klass + k;
  }
  }
 my_obj = { first : first, second:second; third:third}; } 
  }
  my_array.push(my_obj);

我想将第二个变量的名称表示为变量的第一个值。例如，我需要将变量名称称为hello1和hello2。如何实现呢？