BEGIN END questions


 
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# 1  
Old 07-11-2008
BEGIN END questions

Why would you need to use this in a script?
Why can't you just use print to print out what you want printed in the begining and print for what you want at the end.

So this:

Code:
nawk 'BEGIN {print "this is the first line"}
{print $1 $2 $3}
{print $5 $6}
END {print "this is the last line"}'

why can't i just or why would I not use:

Code:
print "this is the first line"
nawk 
'{print $1 $2 $3}
{print $5 $6}'
print "this is the last line"


Last edited by radoulov; 07-11-2008 at 04:44 PM.. Reason: added code tags
# 2  
Old 07-11-2008
Just the rules of the game!

Regards
# 3  
Old 07-11-2008
Quote:
Originally Posted by llsmr777
Why would you need to use this in a script?
Why can't you just use print to print out what you want printed in the begining and print for what you want at the end.

So this:

Code:
nawk 'BEGIN {print "this is the first line"}
{print $1 $2 $3}
{print $5 $6}
END {print "this is the last line"}'

why can't i just or why would I not use:

Code:
print "this is the first line"
nawk 
'{print $1 $2 $3}
{print $5 $6}'
print "this is the last line"

Because you may need something like this or much more:

Code:
awk 'BEGIN {
  printf "Number of arguments: %d\n",
    ARGC
    }
END {
  printf "Number of records read: %d\n",
    NR
}' input

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