--- !ruby/object:RI::MethodDescription aliases: [] block_params: comment: - !ruby/struct:SM::Flow::P body: Formats and writes to <em>ios</em>, converting parameters under control of the format string. See <tt>Kernel#sprintf</tt> for details. full_name: IO#printf is_singleton: false name: printf params: | ios.printf(format_string [, obj, ...] ) => nil visibility: public