#! /bin/bash echo if num smaller than 5,it will continue num=0 while [ $num -lt 5 ] do echo now the num is $num let num++ done
[root@lenny Desktop]# ./while.sh if num smaller than 5,it will continue now the num is 0 now the num is 1 now the num is 2 now the num is 3 now the num is 4
原文：http://www.cnblogs.com/leonarcohen/p/6155307.html