You can do something similar with namelists but it is for items known to the program: not new items.
integer:: inin
real:: rere
namelist /info/ inin, rere
inin = 0 ! default
rere = 20.4 ! default
read (*, nml=info)
print *, 'inin=', inin
print *, 'rere=', rere
stop
end
On the input
&info inin=2 rere=40.0 /
Or if you wish to input one value only
&info rere=3.162 /