printf [ -v name ] format [ arg ... ]
       Print the arguments according to the format specification.
       Formatting rules are the same as used in C. The same escape
       sequences as for echo are recognised in the format. All C conversion
       specifications ending in one of csdiouxXeEfgGn are handled. In
       addition to this, `%b' can be used instead of `%s' to cause escape
       sequences in the argument to be recognised and `%q' can be used to
       quote the argument in such a way that allows it to be reused as
       shell input. With the numeric format specifiers, if the
       corresponding argument starts with a quote character, the numeric
       value of the following character is used as the number to print;
       otherwise the argument is evaluated as an arithmetic expression. See
       the section `Arithmetic Evaluation' in zshmisc(1) for a description
       of arithmetic expressions. With `%n', the corresponding argument is
       taken as an identifier which is created as an integer parameter.

       Normally, conversion specifications are applied to each argument in
       order but they can explicitly specify the nth argument is to be used
       by replacing `%' by `%n$' and `*' by `*n$'.  It is recommended that
       you do not mix references of this explicit style with the normal
       style and the handling of such mixed styles may be subject to future
       change.

       If arguments remain unused after formatting, the format string is
       reused until all arguments have been consumed. With the print
       builtin, this can be suppressed by using the -r option. If more
       arguments are required by the format than have been specified, the
       behaviour is as if zero or an empty string had been specified as the
       argument.

       The -v option causes the output to be stored as the value of the
       parameter name, instead of printed. If name is an array and the
       format string is reused when consuming arguments then one array
       element will be used for each use of the format string.
