How to understand the command awk 'for(x=1;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1' file

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I'm new in awk so maybe my question might seem very basic but I need some help here, please



Command: 



awk 'for(x=1;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1'


I know this command will look for "0.00000" in a file and replace it with an incremental number starting from 1. I understood almost everything except for 'x<=NF' and the number 1 at the end "sub(/0.00000/,++i)}1'. Can you enlighten me on these two points, please?



Also, If I want to do the same thing but replacing the match with an incremental number starting from 0, would it be correct to do: 



awk 'for(x=0;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1' file





awk






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    up vote
    0
    down vote

    favorite












    I'm new in awk so maybe my question might seem very basic but I need some help here, please



    Command: 



    awk 'for(x=1;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1'


    I know this command will look for "0.00000" in a file and replace it with an incremental number starting from 1. I understood almost everything except for 'x<=NF' and the number 1 at the end "sub(/0.00000/,++i)}1'. Can you enlighten me on these two points, please?



    Also, If I want to do the same thing but replacing the match with an incremental number starting from 0, would it be correct to do: 



    awk 'for(x=0;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1' file





    awk






    share







    New contributor




    Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.





















      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I'm new in awk so maybe my question might seem very basic but I need some help here, please



      Command: 



      awk 'for(x=1;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1'


      I know this command will look for "0.00000" in a file and replace it with an incremental number starting from 1. I understood almost everything except for 'x<=NF' and the number 1 at the end "sub(/0.00000/,++i)}1'. Can you enlighten me on these two points, please?



      Also, If I want to do the same thing but replacing the match with an incremental number starting from 0, would it be correct to do: 



      awk 'for(x=0;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1' file





      awk






      share







      New contributor




      Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      I'm new in awk so maybe my question might seem very basic but I need some help here, please



      Command: 



      awk 'for(x=1;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1'


      I know this command will look for "0.00000" in a file and replace it with an incremental number starting from 1. I understood almost everything except for 'x<=NF' and the number 1 at the end "sub(/0.00000/,++i)}1'. Can you enlighten me on these two points, please?



      Also, If I want to do the same thing but replacing the match with an incremental number starting from 0, would it be correct to do: 



      awk 'for(x=0;x<=NF;x++)if($x~/0.00000/)sub(/0.00000/,++i)1' file





      awk




      awk





      share







      New contributor




      Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.










      share







      New contributor




      Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.








      share



      share






      New contributor




      Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      New contributor





      Zeineb Si Chaib is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






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