Trying to improve Bash scripting skills - question

i learn how perform while loop while inside while loop. have written small bit of script love learn simplify. appreciated.
-thanks
dave

code:

#!/bin/bash  a="0"  b="0"  while [ $a -lt 10 ]         echo variable $a , b variable $b.      a=$[$a+1]  done  ##########  a="0"  b="5"  while [ $a -lt 10 ]         echo variable $a , b variable $b.      a=$[$a+1]  done

 

not sure looking for

code:

  #!/bin/bash  a=0  while [ "$a" -lt 10 ]           b=0      while [ "$b" -lt 10 ]                   echo variable $a , b variable $b.            b=$[$b+1]        done        a=$[$a+1]  done    

 

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