Pasting files with 2 columns

hi,

I have files with 2 columns of data

g1.dat
f1.dat
g2.dat
f2.dat
...

I know how to join g1.dat and f1.dat into one file with 4 columns. I do that with awk for example like

awk 'FNR==NR {a[FNR]=$0;next}{print $1, $2, a[FNR]}' f1.dat g1.dat > f1g1.dat

I would like to do this in loop for each pair similarly like for f1.dat and g1.dat. How to do that?


thanks
oliver