如何将for循环Javascript程序格式化为2个小数位？

Question

我尝试了DecimalFormat和parseFloat，但都无法正常工作。

    var NumOfOrganisms = 2;
    var DailyIncrease = .30;
    var NumOfDays;

    console.log("Day" + '\t' + "Approximate Population");
    console.log('1' + '\t' + NumOfOrganisms);

    for(NumOfDays = 2; NumOfDays <= 10; NumOfDays++) {
      NumOfOrganisms = NumOfOrganisms + (NumOfOrganisms * DailyIncrease);
      console.log(NumOfDays + '\t' + NumOfOrganisms);
    }

Answer 1

为了在内部完成此操作，必须使用函数toFixed（）作为参数，您要指定十进制数所需的位数。

干得好：

  var NumOfOrganisms = 2;
  var DailyIncrease = .30;
  var NumOfDays;

  console.log("Day" + '\t' + "Approximate Population");
  console.log('1' + '\t' + NumOfOrganisms);

  for (NumOfDays = 2; NumOfDays <= 10; NumOfDays++) {
      NumOfOrganisms = NumOfOrganisms + (NumOfOrganisms * DailyIncrease);
      console.log(NumOfDays + '\t' + NumOfOrganisms.toFixed(2));
  }