[PROJ] How to construct proper cs2cs command line arguments

[Jean Louis]

* Kristian Evers <kreve at sdfe.dk> [2019-11-25 13:23]:
> Jean Louis,
> 
> Take a look at the documentation for cs2cs. I believe it should answer all your questions regarding cs2cs.
> Here it is: https://proj.org/apps/cs2cs.html

Dear Kristian,

So I chose for example input coordinate system EPSG:4326 and output
EPSG:21036 and then on https://mygeodata.cloud/cs2cs/ I have selected
that, and used coordinate: -1.122159, 29.714413 for which I get the
result: -2897602.84658;13830181.544

and same result I cannot get by using:

$ cs2cs EPSG:4326 EPSG:21036
-1.122159, 29.714413
-3394656.76	9852263.62 0.00, 29.714413

What is then wrong?

Jean