AWK 'if' in loop doesnt work [duplicate]

This question already has an answer here:

• Using shell variable in awk 4 answers

So. I have problem with my variable "$i" because AWK cant read this. But if I was write "echo $i", It be 1.

for ((i=1; i<=$var; i++))

do

awk '{if(NR==$i) print $1}' /ip

done