rhce第五次作业

 
#！/bin/bash
for (( i=1;i<=9;++i ))
do
    for (( j=1;j<=i;++j ))
     do
           echo -n "${i}*${j}=$((i*j)) "
     done
        echo " " #换行
done

score=$1
if [ $score -ge 85 -a $score -le 100 ]
then
    echo “LEVEL A”
elif [ $score -ge 70 -a $score -lt 85 ]
then
    echo “LEVEL B”
elif [ $score -ge 60 -a $score -lt 70 ]
then
    echo “LEVEL C”
elif [ $score -ge 0 -a $score -lt 60 ]
then
    echo “LEVEL D”
else
    echo “wrong score”
fi

for user in seq -f "user%02g" 20
do
echo $user
done