External variable in awk

Question

I have a script, in which a script snippet is:

x=3
awk \'$2=$x{print $1}\' infile

The external variable is x,

but it p

Answer 1

awk has a -v option for this purpose, or as @nevelis mentions, just use double quotes:

awk -v x=3 ' $2==x {print $1} '