[root@test ~]# vim 99.sh

######################################################
 # File Name: 99.sh
 # Author: 寻音
 # E-mail: lnhxzwb@126.com
 # Created Time: Mon 22 Jan 2018 11:07:12 PM CST
 #====================================================
 #!/bin/bash
 for ((i=1;i<=9;i++))
 do
 for ((k=1;k<=i;k++))
 do
 c=$((i*k))

if [ $i -le $k ];then
  echo " $k x $i = $c"
  else
  echo -n " $k x $i = $c"
  fi
  done
  done

[root@test ~]# sh 99.sh

 1 x 1 = 1
 1 x 2 = 2  2 x 2 = 4
 1 x 3 = 3  2 x 3 = 6  3 x 3 = 9
 1 x 4 = 4  2 x 4 = 8  3 x 4 = 12 4 x 4 = 16
 1 x 5 = 5  2 x 5 = 10 3 x 5 = 15 4 x 5 = 20 5 x 5 = 25
 1 x 6 = 6  2 x 6 = 12 3 x 6 = 18 4 x 6 = 24 5 x 6 = 30 6 x 6 = 36
 1 x 7 = 7  2 x 7 = 14 3 x 7 = 21 4 x 7 = 28 5 x 7 = 35 6 x 7 = 42 7 x 7 = 49
 1 x 8 = 8  2 x 8 = 16 3 x 8 = 24 4 x 8 = 32 5 x 8 = 40 6 x 8 = 48 7 x 8 = 56 8 x 8 = 64
 1 x 9 = 9  2 x 9 = 18 3 x 9 = 27 4 x 9 = 36 5 x 9 = 45 6 x 9 = 54 7 x 9 = 63 8 x 9 = 72 9 x 9 = 81

本文为原创作品，转载时请注明出处，否则追究其法律责任！