Preview Ruby 4.1 is a preview. It can change before the final release. Switch to Ruby 4.0 →

instance method

ARGF#printf

printf(format_string, *objects) → nil

VALUE
rb_io_printf(int argc, const VALUE *argv, VALUE out)
{
    rb_io_write(out, rb_f_sprintf(argc, argv));
    return Qnil;
}

Formats and writes objects to the stream.

For details on format_string, see Format Specifications.

See also #print #putc #pos= #puts also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0