How to do a print statement?

If I'm understanding this topic right then Lambda Calculus is programming but using Math. I also heard of it being Turing-complete so it made me think of the Turing-completeness of High Level Programming Languages. Also, that they can do print statements.

Though for some reason I never seem to see anything in Google on how to do a print statement... all I see so far seems to be just computations.

Appreciate any helps with this.