使用For循环实现9x9乘法表

[[email protected] /service/scripts]# cat for-1.sh
#!/bin/bash
for a in {1..9}
do
    for b in $(seq 1 $a)
    do
        echo -en  "${b}x$a=$(($a*$b))\t"
    done
    echo ""  #空行  换行符
done