How to grep the output lines with "."?

[raghda_alsayed]

HI ALL

i have a problem when copmaring two files with diff command the outbut is like that

2,3
123456.30
123456.31
123456.32
8,7
123456.34

i just want to grep the the lines that containes "."
knowing that i try grep '*.*' and grep '.' and grep '??????.??'
unfortunaly i did not get the answer i need
if any one have a solution plz help
regards

 

[revwest]

how to grep this

I think you need to treat it as special character and grep \.

diff file1 file2 | grep \.