Match exact and append zero

Shell Programming and Scripting
1 
file
11  2
12  6
13 7
114 6
011 7

if I'm searching for 11, output needed is

output:
11   2
011 7

Code: awk '$1 ~ /^11$/' file

I used the above to match exact, but it avoiding "011 7" line too, how to resolve this?

2

Try

$ awk '$1+0 == search' search=11 file
11  2
011 7
3

Thanks, as you already explained the numeric and text concept with $+0, i tried like
awk '$+0 ~ /11/' file and it dint work.

Now it working with == and variable, thanks...

4 
$ awk '$1+0 ~ /^11$/' file
11  2
011 7
5

thanks, missing field..

6

Or

awk '$1==11' file
7

Small modification to your code in post#1 will make it work:

awk '$1 ~ /^0*11$/' file