File Operation

Shell Programming and Scripting
1

I have one text file like
1 filename
2 filename2
3 hi
4 myname

i have one variable in which i have index value..i.e.1,2,3 and so...

i want to copy value after the index into somevariable.....

how i can do it....

2 
var=3
awk -v ln=$var '$1==ln {print $2}'  infile | read somevariable
3

what is this inline?

is it syntax or i am suppose to write the filename

i want to read the value after index into any variable how i can do it?