$a = 348
"{0:N2}" -f $a
"{0:D8}" -f $a
"{0:C2}" -f $a
"{0:P0}" -f $a
"{0:X0}" -f $a
348.00
00000348
¥348.00
34,800%
15C
参考:
https://msdn.microsoft.com/zh-cn/library/dwhawy9k(v=vs.110).aspx?cs-save-lang=1&cs-lang=csharp#DFormatString
https://technet.microsoft.com/en-us/library/ee692795.aspx
http://www.pstips.net/formatting-string.html
http://www.pstips.net/formatting-numbers-easily.html