What is the equivalent of sprintf in Prolog?

Question

Prolog has an equivalent of the C library printf, which is format/2 or format/3.

But what is the equivalent of sprintf ?

Answer 1

You can use format/3 providing string(S) or atom(A) as the first argument:

?- format(string(String), 'Hello ~w', ['World!']).
String = "Hello World!".

?- format(atom(String), 'Hello ~w', ['World!']).
String = 'Hello World!'.