1 #!/bin/bash
 2 
 3 for i in {1,2,3,4,5,6,7,8,9}
 4 do
 5     for((j=1;j<=i;j++))
 6     do
 7         ((product=$i*$j))
 8         echo -ne "\033[47;30m$i"x"$j=$product\033[0m\t"
 9     done
10     echo
11 done