Why does print work with awk but echo doesn't?












0














To sum it up....



This works:



awk 'BEGIN { FS=":"; }

{ print  $1  $3  $5; }' /etc/passwd


But this doesn't:



awk 'BEGIN { FS=":"; }

{ echo  $1  $3  $5; }' /etc/passwd


I would like to know why.






awk echo







share|improve this question




















  • 1




    print is a keyword in Awk; echo is a shell word. Your examples are Awk examples that happen to be run in a shell...
    – jasonwryan
    Mar 24 '16 at 4:34








  • 3




    1. because awk doesn't have an echo keyword, it has print instead. 2. because awk and sh (or bash/dash/zsh/ksh etc. and perl. and python) are different scripting languages and have different keywords and syntax.
    – cas
    Mar 24 '16 at 5:15
















0














To sum it up....



This works:



awk 'BEGIN { FS=":"; }

{ print  $1  $3  $5; }' /etc/passwd


But this doesn't:



awk 'BEGIN { FS=":"; }

{ echo  $1  $3  $5; }' /etc/passwd


I would like to know why.






awk echo







share|improve this question




















  • 1




    print is a keyword in Awk; echo is a shell word. Your examples are Awk examples that happen to be run in a shell...
    – jasonwryan
    Mar 24 '16 at 4:34








  • 3




    1. because awk doesn't have an echo keyword, it has print instead. 2. because awk and sh (or bash/dash/zsh/ksh etc. and perl. and python) are different scripting languages and have different keywords and syntax.
    – cas
    Mar 24 '16 at 5:15














0












0








0







To sum it up....



This works:



awk 'BEGIN { FS=":"; }

{ print  $1  $3  $5; }' /etc/passwd


But this doesn't:



awk 'BEGIN { FS=":"; }

{ echo  $1  $3  $5; }' /etc/passwd


I would like to know why.






awk echo







share|improve this question















To sum it up....



This works:



awk 'BEGIN { FS=":"; }

{ print  $1  $3  $5; }' /etc/passwd


But this doesn't:



awk 'BEGIN { FS=":"; }

{ echo  $1  $3  $5; }' /etc/passwd


I would like to know why.






awk echo




awk echo






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 2 hours ago









Rui F Ribeiro

39.2k1479130




39.2k1479130










asked Mar 24 '16 at 4:24









user3271166

1615




1615








  • 1




    print is a keyword in Awk; echo is a shell word. Your examples are Awk examples that happen to be run in a shell...
    – jasonwryan
    Mar 24 '16 at 4:34








  • 3




    1. because awk doesn't have an echo keyword, it has print instead. 2. because awk and sh (or bash/dash/zsh/ksh etc. and perl. and python) are different scripting languages and have different keywords and syntax.
    – cas
    Mar 24 '16 at 5:15














  • 1




    print is a keyword in Awk; echo is a shell word. Your examples are Awk examples that happen to be run in a shell...
    – jasonwryan
    Mar 24 '16 at 4:34








  • 3




    1. because awk doesn't have an echo keyword, it has print instead. 2. because awk and sh (or bash/dash/zsh/ksh etc. and perl. and python) are different scripting languages and have different keywords and syntax.
    – cas
    Mar 24 '16 at 5:15








1




1




print is a keyword in Awk; echo is a shell word. Your examples are Awk examples that happen to be run in a shell...
– jasonwryan
Mar 24 '16 at 4:34






print is a keyword in Awk; echo is a shell word. Your examples are Awk examples that happen to be run in a shell...
– jasonwryan
Mar 24 '16 at 4:34






3




3




1. because awk doesn't have an echo keyword, it has print instead. 2. because awk and sh (or bash/dash/zsh/ksh etc. and perl. and python) are different scripting languages and have different keywords and syntax.
– cas
Mar 24 '16 at 5:15




1. because awk doesn't have an echo keyword, it has print instead. 2. because awk and sh (or bash/dash/zsh/ksh etc. and perl. and python) are different scripting languages and have different keywords and syntax.
– cas
Mar 24 '16 at 5:15










1 Answer
1






active

oldest

votes


















2














The structure of awk execution is: pattern { action statements }




Actions

    Action statements are enclosed in braces, { and }. Action statements
consist of the usual assignment, conditional, and looping statements
found in most languages. The operators, control statements, and
input/output statements available are patterned after those in C.






  • print is I/O statement of awk.



    From manpage:



    print                 Print the current record.  The output record is terminated with the value of ORS.



  • Visit manual>The print Statement:




    The print Statement



    Use the print statement to produce output with simple, standardized formatting. You specify only the strings or numbers to print, in a list separated by commas. They are output, separated by single spaces, followed by a newline. The statement looks like this:



    print item1, item2, …





Visit man awk for more details.



Also note that:



PATTERNS AND ACTIONS

       AWK is a line-oriented language.  The pattern comes  first,  and  then  the  action.   Action  statements  are

       enclosed  in  {  and  }.  Either the pattern may be missing, or the action may be missing, but, of course, not

       both.  If the pattern is missing, the action is executed for every single record of input.  A  missing  action

       is equivalent to



              { print }



       which prints the entire record.



awk doesn't have echo keyword/statement.



$ man awk | grep echo | wc -l

0





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    1 Answer
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    active

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    2














    The structure of awk execution is: pattern { action statements }




    Actions

        Action statements are enclosed in braces, { and }. Action statements
    consist of the usual assignment, conditional, and looping statements
    found in most languages. The operators, control statements, and
    input/output statements available are patterned after those in C.






    • print is I/O statement of awk.



      From manpage:



      print                 Print the current record.  The output record is terminated with the value of ORS.



    • Visit manual>The print Statement:




      The print Statement



      Use the print statement to produce output with simple, standardized formatting. You specify only the strings or numbers to print, in a list separated by commas. They are output, separated by single spaces, followed by a newline. The statement looks like this:



      print item1, item2, …





    Visit man awk for more details.



    Also note that:



    PATTERNS AND ACTIONS
    
       AWK is a line-oriented language.  The pattern comes  first,  and  then  the  action.   Action  statements  are
    
       enclosed  in  {  and  }.  Either the pattern may be missing, or the action may be missing, but, of course, not
    
       both.  If the pattern is missing, the action is executed for every single record of input.  A  missing  action
    
       is equivalent to
    

    
              { print }
    

    
       which prints the entire record.



    awk doesn't have echo keyword/statement.



    $ man awk | grep echo | wc -l
    
0





    share|improve this answer




























      2














      The structure of awk execution is: pattern { action statements }




      Actions

          Action statements are enclosed in braces, { and }. Action statements
      consist of the usual assignment, conditional, and looping statements
      found in most languages. The operators, control statements, and
      input/output statements available are patterned after those in C.






      • print is I/O statement of awk.



        From manpage:



        print                 Print the current record.  The output record is terminated with the value of ORS.



      • Visit manual>The print Statement:




        The print Statement



        Use the print statement to produce output with simple, standardized formatting. You specify only the strings or numbers to print, in a list separated by commas. They are output, separated by single spaces, followed by a newline. The statement looks like this:



        print item1, item2, …





      Visit man awk for more details.



      Also note that:



      PATTERNS AND ACTIONS
      
       AWK is a line-oriented language.  The pattern comes  first,  and  then  the  action.   Action  statements  are
      
       enclosed  in  {  and  }.  Either the pattern may be missing, or the action may be missing, but, of course, not
      
       both.  If the pattern is missing, the action is executed for every single record of input.  A  missing  action
      
       is equivalent to
      

      
              { print }
      

      
       which prints the entire record.



      awk doesn't have echo keyword/statement.



      $ man awk | grep echo | wc -l
      
0





      share|improve this answer


























        2












        2








        2






        The structure of awk execution is: pattern { action statements }




        Actions

            Action statements are enclosed in braces, { and }. Action statements
        consist of the usual assignment, conditional, and looping statements
        found in most languages. The operators, control statements, and
        input/output statements available are patterned after those in C.






        • print is I/O statement of awk.



          From manpage:



          print                 Print the current record.  The output record is terminated with the value of ORS.



        • Visit manual>The print Statement:




          The print Statement



          Use the print statement to produce output with simple, standardized formatting. You specify only the strings or numbers to print, in a list separated by commas. They are output, separated by single spaces, followed by a newline. The statement looks like this:



          print item1, item2, …





        Visit man awk for more details.



        Also note that:



        PATTERNS AND ACTIONS
        
       AWK is a line-oriented language.  The pattern comes  first,  and  then  the  action.   Action  statements  are
        
       enclosed  in  {  and  }.  Either the pattern may be missing, or the action may be missing, but, of course, not
        
       both.  If the pattern is missing, the action is executed for every single record of input.  A  missing  action
        
       is equivalent to
        

        
              { print }
        

        
       which prints the entire record.



        awk doesn't have echo keyword/statement.



        $ man awk | grep echo | wc -l
        
0





        share|improve this answer














        The structure of awk execution is: pattern { action statements }




        Actions

            Action statements are enclosed in braces, { and }. Action statements
        consist of the usual assignment, conditional, and looping statements
        found in most languages. The operators, control statements, and
        input/output statements available are patterned after those in C.






        • print is I/O statement of awk.



          From manpage:



          print                 Print the current record.  The output record is terminated with the value of ORS.



        • Visit manual>The print Statement:




          The print Statement



          Use the print statement to produce output with simple, standardized formatting. You specify only the strings or numbers to print, in a list separated by commas. They are output, separated by single spaces, followed by a newline. The statement looks like this:



          print item1, item2, …





        Visit man awk for more details.



        Also note that:



        PATTERNS AND ACTIONS
        
       AWK is a line-oriented language.  The pattern comes  first,  and  then  the  action.   Action  statements  are
        
       enclosed  in  {  and  }.  Either the pattern may be missing, or the action may be missing, but, of course, not
        
       both.  If the pattern is missing, the action is executed for every single record of input.  A  missing  action
        
       is equivalent to
        

        
              { print }
        

        
       which prints the entire record.



        awk doesn't have echo keyword/statement.



        $ man awk | grep echo | wc -l
        
0






        share|improve this answer














        share|improve this answer



        share|improve this answer








        edited Mar 24 '16 at 5:22

























        answered Mar 24 '16 at 4:38









        Pandya

        8,6241549103




        8,6241549103






























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