九九乘法表

 

 

方法一
#!/bin/bash
#
for I in {1..9}; do
   for A in `seq 1 $I`; do
        echo -n "${I}X${A}=$[$I*$A] "
   done
  echo
done

方法二
#!/bin/bash
#
for (( i=1;i<=9;i++)) do
   for (( j=1;j<=i;j++)) do
      echo -n "$i*$j=$[i*j] "
   done
   echo
done