Parsing variables in Blynk.begin help

Blynk.begin(servAuth,mysid,mypass,IPAddress(ip))…

o.k. first three are const char* which work cloud or local, but exactly what variable type I can assign the “xxx,xxx,xxx,xxx” to, defeats me at the moment. ( C is not my best subject!).

I am using a web server input of these variables with no issue, stored in flash ( via eeprom) and have the choice of cloud or local and changing the auth at will, but just need the last step of getting the port through, and I’m there.

Any help much appreciated.

You can always check examples that come with Blynk library:
https://github.com/blynkkk/blynk-library/blob/master/examples/BoardsAndShields/Arduino_Ethernet_Manual/Arduino_Ethernet_Manual.ino