Simple Functions Question

I have a function which contains some code and about half way through calls another function. Only problem is it stops the main function from running so the code following it isnt executed.
What I want to know is is there anyway to go back into the original function at the point at where I left and carry on executing?

I’ve thought of one solution but its a bit long winded and I just wanted to know if there was a quick and easy method, before anyone asks the code needs to be in its current order.

thanks in advance. :}