sprintf() operator can be applied to either a number or a string. The operator takes a formatting string as its sole argument. The formatting string follows the conventions for
sprintf() established in other languages. Specifically, the KRL version of
sprintf() follows the formatting conventions for Perl. For exampleCurrently, the formatting string for numbers supports
%d and does not support escaping a literal
a = 10 cb = a.sprintf("< %d>") // cb = "< 10>"