import java.math.BigDecimal; import java.text.DecimalFormat; import java.text.NumberFormat; public class format { double f = 111231.5585; public void m1() { BigDecimal bg = new BigDecimal(f); double f1 = bg.setScale(2, BigDecimal.ROUND_HALF_UP).doubl
需求:#将数字填充到对应金额单中 select substr(b.payMoney,length(b.payMoney),1) 分, substr(b.payMoney,length(b.payMoney)-1,1) 角, case when length(b.payMoney)-3 <=0 then '' else substr(b.payMoney,length(b.payMoney)-3,1) end 圆, case when length(b.payMoney)-4 <=0 then
function toDecimal2(x) { var f = parseFloat(x); if (isNaN(f)) { return false; } var f = Math.round(x*100)/100; var s = f.toString(); var rs = s.indexOf('.'); if (rs < 0) { rs = s.length; s += '.'; } while (s.length <= rs + 2) { s += '0'; } return s;
function changeTwoDecimal_f(x) { var f_x = parseFloat(x); if (isNaN(f_x)) { alert('function:changeTwoDecimal->parameter error'); return false; } var f_x = Math.round(x * 100) / 100; var s_x = f_x.toString(); var pos_decimal = s_x.indexOf('.'); if (po
js保留两位小数四舍五入: (Math.floor(until_price*100)/100).toFixed(2);//会四舍五入 保留两位小数 且不四舍五入(三种方式,请用最后一种): var num="2.999999999"; num = Number(num); num*=100; num = (Math.floor(num)/100).toFixed(2); alert(num); var a = "2.999999999"; a = a-0; a*
换行的字符串 "This string\nhas two lines" 字符串中使用单引号时应该怎么写 'You\'re right, it can\'t be a quote' 把数字变成字符串并保留两位小数 var n = 123456.789 n.toFixed(0); //"123457" n.toFixed(2); //"123456.79" parseFloat(str)str以非数字开头,则返回NaN parseFloat(str)
1,下面是一个浮点类型的数字转成String字符串的例子 1 2 var f = 123.32342342 var s:String = "\(f)" //123.32342342 2,如果要保留两位小数 1 2 var f = 123.32342342 var s = String(format: "%.2f", f) //123.32