De0 Nano ADC demo coding explanations

[Altera_Forum]

Hello everyone, there's a code line (below) I don't understand from the De0-Nano ADC demo. I tried to find out about the (?) but as far as I can get, there is only (?: conditional) in verilog syntax. Is it mean when go_en is high, the oSCLK is equal to iCLK? 

Can somebody explain?   assign oSCLK = (go_en)? iCLK:1;

[Altera_Forum]

This assignation is equivalent to multiplexer with go_en tied to control input. So if go_en==1 then oSCLK=iCLK else oSCLK=1.

[Altera_Forum]

OK, thank you