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→Print with condition
== Print with condition ==
== Print with condition ==
awk '{if ($3 =="" || $4 == "" || $5 == "") print "Some score for the student",$1,"is missing";'}' student-marks
awk '{if ($3 =="" || $4 == "" || $5 == "") print "Some score for the student",$1,"is missing";'}' student-marks
== Print if value ==
<nowiki>$ echo "a b c d" | awk '($4){print "yes"}'
yes
$ echo "a b c d" | awk '($14){print "yes"}' ## prints nothing, no $14
$ echo "a b c 0" | awk '($4){print "yes"}' ## prints nothing, $4 is 0</nowiki>
== Print columns as lines ==
== Print columns as lines ==