The rule of using '{}' (awk)

[Peng Yu]

Hi,

I get the following syntax error. The error is fixed if I remove the
out most '{}'. I am wondering what the rule is to use '{}' in awk.,

Regards,
Peng

$ awk '{!/#.*/ {print $1,$2,$3}}' data.txt
awk: {!/#.*/ {print $1,$2,$3}}
awk:         ^ syntax error