Shell Programming and Scripting

awk '{x print $1}' infile

awk 'BEGIN {a=100} $1>100 { print $1 } $1<=100 { print $1 " lower then 100" }'

awk ' {a=100; print ( $1 > a ) ? $1 : $1" lower then 100" }' input

function testme (field,num)
{
	print ( field > num ) ? field : field " is less then " num
}
{
testme ($1,100)
}

x='if($1>100)'
awk '{'$x' print $1}' infile

$ x='if ($1 > 100)'
$ printf "%s\n" 99 101 3 | awk '{'$x'print $1}'
awk: cmd. line:1: {if
awk: cmd. line:1:    ^ unexpected newline or end of string
$ printf "%s\n" 99 101 3 | awk '{'"$x"'print $1}'
101

mute@atom:~$ x=100
mute@atom:~$ printf '%s\n' 99 101 3 | awk -v "num=$x" '$1 > num'
101

1,2,3,4
2,3,4,5
3,4,5,6
4,5,6,7
5,6,7,8
6,7,8,9,
7,8,9,10
8,9,10,11
9,10,11,12

1 2 3 4 
3 5 7 9 
6 9 12 15 
10 14 18 22 
15 20 25 30 
21 27 33 39 
28 35 42 49 
36 44 52 60 
45 54 63 72

$z='x1" "x2" "x3" "x4'
$y='x1+=$1;x2+=$2;x3+=$3;x4+=$4'
$awk -F, '{'"$y"'} {print '"$z"'}'  infile

awk -F, '{y="";z="";for(i=NF;i>=1;i--) {y="x"i"+=$"i";"y  ;z="x"i"\" \""z}  {'"$y"'} {print '"$z"'} }'  infile