数字前面的0

Question

我想用这种格式打印:ex.

1 -> 000001
15 -> 000015

我能怎么做？谢谢

Answer 1

sprintf "%06d", 1     #=> "000001"
sprintf "%06d", 15    #=> "000015"

或者更简单

"%06d" % 1     #=> "000001"
"%06d" % 15    #=> "000015"