round, for example: The number 1.64 can be rounded to 1.6 or to 2. 1.64可以四舍五入到1.6或2
roundThe round() method rounds a number to the nearest integer. 方法将数字四舍五入成最接近的整数。 Here you can see two bottom pieces rounded. 在这里你可以看到两件底部四舍五入.