Question

我在Firefox控制台上尝试此代码，但我不知道如何得到正确答案（0.11）。我想了解为什么这段代码没有像我预期的那样工作。有人可以帮助我理解。谢谢！

  var a = "12,25";
  var b = "12,14";

  console.log("A: " + a);
  console.log("B: " + b);

  var parsedA = parseFloat(a.replace(',', '.'));
  var parsedB = parseFloat(b.replace(',', '.'));

  console.log('Parsed A: ' + parsedA);
  console.log('Parsed B: ' + parsedB);

  console.log("Dif Parsed Float: " + (parsedA - parsedB));

  var numberA = Number(a.replace(',', '.'));
  var numberB = Number(b.replace(',', '.'));

  console.log('Number A: ' + numberA);
  console.log('Number B: ' + numberB);

  console.log("Dif Number: " + (parsedA - parsedB));

Answer 1

只需使用toFixed（2）作为结果

  var a = "12,25";
  var b = "12,14";

  console.log("A: " + a);
  console.log("B: " + b);

  var parsedA = parseFloat(a.replace(',', '.'));
  var parsedB = parseFloat(b.replace(',', '.'));

  console.log('Parsed A: ' + parsedA);
  console.log('Parsed B: ' + parsedB);

  console.log("Dif Parsed Float: " + (parsedA - parsedB));

  var numberA = Number(a.replace(',', '.'));
  var numberB = Number(b.replace(',', '.'));

  console.log('Number A: ' + numberA);
  console.log('Number B: ' + numberB);

  console.log("Dif Number: " + (parsedA - parsedB).toFixed(2)); //<<< here

Javascript十进制减法

1 个答案: