如何在 Jquery/Javascript 中舍入 parseFloat 结果?

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时间:2020-10-26 08:16:23  来源:igfitidea点击:

How to round off parseFloat results in Jquery/Javascript?

javascriptjqueryroundingparseintparsefloat

提问by Davinchie_214

How would I round off a value from a textfield with a parseFloatresult in it? This application basically sums up the value of all radio buttons when clicked and displays the sum in a textbox.

我如何将文本字段中的值四舍五入并显示parseFloat结果?该应用程序基本上总结了单击时所有单选按钮的值,并在文本框中显示总和。

The code below works perfectly if the radio button value is an integer, however if I want to have a floating point value on the radio button, the total value will have a 100.0000000679when it should be 100. Any tips would be very much appreciated. Thanks in advance.

如果单选按钮值是整数,则下面的代码可以完美运行,但是如果我想在单选按钮上有一个浮点值,则总值100.0000000679应该是100. 任何提示将不胜感激。提前致谢。

function calcscore(){
  var score = 0;
  $(".calc:checked").each(function(){
    score+=parseFloat($(this).val(),10);
  });
  $("input[name=openingsum]").val(score);
}
$().ready(function(){
    $(".calc").change(function(){
        calcscore();
    });
});

HTML Code:

HTML代码:

<input class="calc" name="v2" type="radio" onclick="ver2(this);" value="1.6666666666666666666666666666667" />Yes
<input class="calc" name="v2" type="radio" onclick="ver2(this);" value="0" />No

回答by Neysor

At first i think you provided us with a different example then expected. If you tell us something about getting 100.0000000679and in your code is only a value of 1.6666666666666666666666666666667there is something wrong :)

起初,我认为您为我们提供了一个与预期不同的示例。如果您告诉我们有关获取的信息,100.0000000679并且在您的代码中只是一个值,1.6666666666666666666666666666667则有问题:)

So I hope your problem is only to round the correct way. For that you can use .toFixed()

所以我希望你的问题只是为了正确的方法。为此,您可以使用.toFixed()

See the example on jsfiddle

请参阅jsfiddle 上的示例

HTML:

HTML:

<input class="calc" name="v1" type="radio" onclick="ver2(this);" value="1.6666666666666666666666666666667" />Yes
<input class="calc" name="v1" type="radio" onclick="ver2(this);" value="0" />No
<br>
<input class="calc" name="v2" type="radio" onclick="ver2(this);" value="1.6666666666666666666666666666667" />Yes
<input class="calc" name="v2" type="radio" onclick="ver2(this);" value="0" />No
<br>
<input class="calc" name="v3" type="radio" onclick="ver2(this);" value="1.6666666666666666666666666666667" />Yes
<input class="calc" name="v3" type="radio" onclick="ver2(this);" value="0" />No
<br>
<input type="text" name="openingsum">?

JAVASCRIPT:

爪哇脚本:

function calcscore(){
  var score = 0;
  $(".calc:checked").each(function(){
    score+=parseFloat($(this).val(),10);
  });
  score = score.toFixed(2);
  $("input[name=openingsum]").val(score);
}
$().ready(function(){
    $(".calc").change(function(){
        calcscore();
    });
});?