如何使用jquery添加2个文本框？

Question

I need to add a number already from a textbox with a number from an array. currently getting NaN

       // textbox
 var totalScore = $("#totalPointsInt");
       // setting value
 $(totalScore).val(0);

 $(totalScore).val(parseFloat(totalScore.val) + 6);

Answer 1

as I said in comments you need to use $(totalScore).val() instead of totalScore.val

 $(totalScore).val(parseFloat($(totalScore).val()) + 6);

and while you use var totalScore = $("#totalPointsInt"); you can use totalScore directly instead of $(totalScore)

// textbox
 var totalScore = $("#totalPointsInt");
 // setting value
 totalScore.val(0);
 totalScore.val(parseFloat(totalScore.val()) + 6);

Answer 2

totalScore.val(parseFloat(totalScore.val()) + 6);