條件語句示例

一、while語句

declare -i i=0

declare -i sum=0

while [ ${i} != 100 ]

do

        i=$((${i}+1))

#       echo "i=${i}"

        sum=$((${sum}+${i}))

done

echo "${sum}"

二、for語句

mypath=/etc/passwd

myusers=$(cat ${mypath} | awk -F":" '{print $1}')

for users in ${myusers}

        id ${users}

exit 0

三、for語句