📅  最后修改于: 2022-03-11 15:02:03.480000             🧑  作者: Mango
Math.round(X); // round X to an integer
Math.round(10*X)/10; // round X to tenths
Math.round(100*X)/100; // round X to hundredths
Math.round(1000*X)/1000; // round X to thousandths
...