输入 : -81.826377999999999(小数点后14个数字)
输出:-81.82637799999999(小数点后13个数字)
如何使用javascript实现这一点?
试试这个。看看它是否适合您
var x = -81.82637799999999;
x = x.toString(); // convert to string
alert(x.length);
x = x.substring(0, x.length - 1); // cut out last character
alert(x.length);
x = parseFloat(x); // convert it back to float
https://jsfiddle.net/9sngtp3n/1/