The Mythryl printf, sprintf, and fprintf are curried, so argument follow without commas. Argument expressions must be parenthesized. The printf function prints to stdout, the sprintf constructs and returns a string, and the fprintf function writes to the specified stream; they are otherwise identical.
Example:
eval: printf "%d\n" 12; 12 eval: apply (printf "%d\n") [ 12, 13, 14 ]; 12 13 14