-:ref:`begin <cmd-begin>` to begin a block and :ref:`end <cmd-end>` to end any block (including ifs and loops).
-:ref:`and <cmd-and>`, :ref:`or <cmd-or>` and :ref:`not <cmd-not>` to combine commands logically.
-:ref:`switch <cmd-switch>` and :ref:`case <cmd-case>` to make multiple blocks depending on the value of a variable.
Decorations
^^^^^^^^^^^
Command decorations are keywords like :ref:`command <cmd-command>` or :ref:`builtin <cmd-builtin>` to tell fish what sort of thing to execute, and :ref:`time <cmd-time>` to time its execution. :ref:`exec <cmd-exec>` tells fish to replace itself with the command.
Tools to do a task
^^^^^^^^^^^^^^^^^^
Builtins to do a task, like
-:ref:`cd <cmd-cd>` to change the current directory.
-:ref:`echo <cmd-echo>` or :ref:`printf <cmd-printf>` to produce output.
-:ref:`set <cmd-set>` to set, query or erase variables.
-:ref:`read <cmd-read>` to read input.
-:ref:`string <cmd-string>` for string manipulation.
-:ref:`math <cmd-math>` does arithmetic.
-:ref:`argparse <cmd-argparse>` to make arguments easier to handle.
-:ref:`count <cmd-count>` to count arguments.
-:ref:`type <cmd-type>` to find out what sort of thing (command, builtin or function) fish would call, or if it exists at all.
-:ref:`test <cmd-test>` checks conditions like if a file exists or a string is empty.
-:ref:`contains <cmd-contains>` to see if a list contains an entry.
-:ref:`eval <cmd-eval>` and :ref:`source <cmd-source>` to run fish code from a string or file.
-:ref:`set_color <cmd-set_color>` to colorize your output.
-:ref:`status <cmd-status>` to get shell information, like whether it's interactive or a login shell, or which file it is currently running.
-:ref:`bind <cmd-bind>` to change bindings.
-:ref:`commandline <cmd-commandline>` to get or change the commandline contents.
-:ref:`fish_config <cmd-fish_config>` to easily change fish's configuration, like the prompt or colorscheme.
-:ref:`random <cmd-random>` to generate random numbers or pick from a list.
Known functions
^^^^^^^^^^^^^^^^
Known functions are a customization point. You can change them to change how your fish behaves. This includes:
-:ref:`fish_prompt <cmd-fish_prompt>` and :ref:`fish_right_prompt <cmd-fish_right_prompt>` and :ref:`fish_mode_prompt <cmd-fish_mode_prompt>` to print your prompt.
-:ref:`fish_command_not_found <cmd-fish_command_not_found>` to tell fish what to do when a command is not found.
-:ref:`fish_title <cmd-fish_title>` to change the terminal's title.
-:ref:`fish_greeting <cmd-fish_greeting>` to show a greeting when fish starts.
Helper functions
^^^^^^^^^^^^^^^^
Some helper functions, often to give you information for use in your prompt:
-:ref:`fish_git_prompt <cmd-fish_git_prompt>` and :ref:`fish_hg_prompt <cmd-fish_hg_prompt>` to print information about the current git or mercurial repository.
-:ref:`fish_vcs_prompt <cmd-fish_vcs_prompt>` to print information for either.
-:ref:`fish_svn_prompt <cmd-fish_svn_prompt>` to print information about the current svn repository.
-:ref:`fish_status_to_signal <cmd-fish_status_to_signal>` to give a signal name from a return status.
-:ref:`prompt_pwd <cmd-prompt_pwd>` to give the current directory in a nicely formatted and shortened way.
-:ref:`prompt_login <cmd-prompt_login>` to describe the current login, with user and hostname, and to explain if you are in a chroot or connected via ssh.
-:ref:`fish_is_root_user <cmd-fish_is_root_user>` to check if the current user is an administrator user like root.
-:ref:`fish_add_path <cmd-fish_add_path>` to easily add a path to $PATH.
-:ref:`alias <cmd-alias>` to quickly define wrapper functions ("aliases").
Helper commands
^^^^^^^^^^^^^^^
fish also ships some things as external commands so they can be easily called from elsewhere.
This includes :ref:`fish_indent <cmd-fish_indent>` to format fish code and :ref:`fish_key_reader <cmd-fish_key_reader>` to show you what escape sequence a keypress produces.
