javascript - 为什么 '+' 运算符要连接我的数字？

Question

我想访问在输入框中输入的值，然后获取它们的总和，但是 javascript 正在连接结果。这是代码

<script>

   $(document).ready(function(){
     $( "#dateSelector" ).click(function(){ 
    $(this).datepicker();
     });
   });

  $(document).ready(function(){
    $("#ocb750cb").click(function(){
      var closingBal = 0;
    var openingBal = document.getElementById("ocb750ob").value;
    alert(openingBal);
    Number(openingBal);
    var stockBal =  document.getElementById("ocb750sb").value;
    alert(stockBal);
    Number(stockBal);
    var sold = document.getElementById("ocb750sl").value; 
    alert(sold);
    var store = document.getElementById("ocb750cb");
        store.value = (stockBal + openingBal) - sold;
    });



 });



</script>



<th class = "main brand">OCB 750</th>
<th class = "main"><input type="text" maxlength="5" id="ocb750ob"></th>
<th class = "main"><input type="text" maxlength="5" id="ocb750sb"></th>
<th class = "main"><input type="text" maxlength="5" id="ocb750tl"></th>
<th class = "main"><input type="text" maxlength="5" id="ocb750sl"></th>
<th class = "main"><input type="text" maxlength="5" id="ocb750rs"></th>
<th class = "main"><input type="text" maxlength="5" id="ocb750cb"></th>

假设我输入 5 和 2，我的输出将是 52 而不是 7，它正在连接

Answer 1

您的值具有字符串格式，您需要使用 parceInt