linux - Creating a nested for loop in bash script -

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i trying create nested loop count 1 10 , second or nested loop count 1 5.

for ((i=1;i<11;i++));      ((a=1;a<6;a++));               echo $i:$a      done done

what though output of loop going was:

1:1 2:2 3:3 4:4 5:5 6:1 7:2 8:3 9:4 10:5

but instead output was

1:1 1:2 1:3 1:4 1:5 2:1 ... 2:5 3:1 ... , same thing till 10:5

how can modify loop result want! thanks

your logic wrong. don't want nested loop @ all. try this:

for ((i=1;i<11;++i));     echo "$i:$((i-5*((i-1)/5)))" done

this uses integer division subtract right number of multiples of 5 value of $i:

  • when $i between 1 , 5, (i-1)/5 0, nothing subtracted
  • when $i between 6 , 10, (i-1)/5 1, 5 subtracted

etc.


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