Comment # 1 on bug 1179816 from Michael Andres

> zypper [--global-opts] command [--command-opts] [command-arguments]

As a global-option zypper accepts "-n, --non-interactive" together with any
command (recommended):
    zypper -n COMMAND ...

Only some commands accept a (legacy) "-y, --no-confirm" as command-option
(passed after the command name):
    zypper in -y ...


It seems to work as expected, but I rephrased the man page tying to point out
the difference more clearly:

           -y, --no-confirm
               Don���������t  require user interaction. It���������s recommended to use the
               --non-interactive global option instead. Global options  are
               passed  before the command (zypper --non-interactive COMMAND
               ...). Unlike  the  no-confirm  command  option,  the  global
               option can be used together with any zypper command.