編輯condition.sh

read -p "請(qǐng)輸入數(shù)字1:" a
read -p "請(qǐng)輸入數(shù)字2:" b
echo $a
echo $b

if [ $a == $b ] 
    then 
    echo "兩數(shù)相等"
elif [ $a -gt $b ] 
    then 
    echo "數(shù)字1大"
elif [ $a -lt $b ] 
    then 
    echo "數(shù)字1小"
else 
    echo "不靈";
fi

if [ $a == $b ]; then echo "兩數(shù)相等"; 
elif [ $a -gt $b ]; then echo "數(shù)字1大";
elif [ $a -lt $b ]; then echo "數(shù)字1小"; 
else echo "亂了"; fi



for str in This is a string
    do
    echo $str
done


wil=1
while(($wil <= 5))
do
    echo -n $wil
    let "wil++"
done



while read -p "寫(xiě)點(diǎn)什么" webname
do
    echo "你輸入的是：$webname"
done


while :
do
    echo '輸入 a,b,c或者d'
    read strabcd
    case $strabcd in
        a|b|c|d)  echo "你選擇了 $strabcd"
        ;;
        *)  echo "你沒(méi)有輸入abcd"
        break
        ;;
    esac

done

執(zhí)行condition.sh

./condition.sh 
請(qǐng)輸入數(shù)字1:1
請(qǐng)輸入數(shù)字2:2
1
2
數(shù)字1小
數(shù)字1小
This
is
a
string
12345寫(xiě)點(diǎn)什么abcd
你輸入的是：abcd
寫(xiě)點(diǎn)什么asdf
你輸入的是：asdf
寫(xiě)點(diǎn)什么123
你輸入的是：123