例1：

isLeapYear.sh

#!/bin/sh

year=$1

if (( (0==$year%4 && 0!=$year%100) || 0==$year%2000)); then

    echo "Leap"

else

    echo "Average"

fi

exit 0

例2：

monthName.sh

month=$1

case $month in

    1)

    echo "January"

    ;;

    2)

    echo "February"

    ;;

    3)

    echo "March"

    ;;

    4)

    echo "April"

    ;;

    5)

    echo "May"

    ;;

    6)

    echo "June"

    ;;

    7)

    echo "July"

    ;;

    8)

    echo "August"

    ;;

    9)

    echo "September"

    ;;

    10)

    echo "October"

    ;;

    11)

    echo "November"

    ;;

    12)

    echo "December"

    ;;

esac

exit 0