#!/bin/bash
# *********************************************************#
#                                                          #
# * Author        : 藻头男                                  #
# * QQ邮箱        : 2322944912@qq.com                      #
# * Create time   : 2024-01-02-21-00-00                    #
# * Filename      : cheng.sh                               #
# * Description   : This is Shell scripts                  #
#                                                          #
#                                                          #
# ********************************************************#
 clear    #清屏执行 
#第一种方法for循环
 for i in {1..9}
 do
 for o in `seq $i`
 do
     echo -n -e "$o x $i = $[$i*$o]\t"
 done
    echo
 done 

echo "" 

#第二种方法while循环
 a=0
 while [ $a -lt 9 ]
 do
    let a++
 b=0
        while [ $b -lt $a ]
        do
             let b++
             echo -ne "$b x $a = $[$b*$a]\t"     
        done    
             echo
 done

感谢观看！希望能够帮助到大家！