if与case

#!/bin/bash if [ $1 -lt 3 ];then echo redhat elif [ $1 -eq 3 ];then echo green elif [ $1 -gt 3 -a $1 -lt 5 ];then echo yellow else echo white fi

---

case $1 in
        1|one|first)echo redhat;;
        2)echo yellow;;
        3)echo green;;
        *)echo blue;;
esac