Simple commands:

  $ echo foo

  foo

  $ printf 'oh no'

  oh no (no-eol)

  $ printf 'bar\nbaz\n' | cat

  bar

  baz

Multi-line command:

  $ foo() {

  >     echo bar

  > }

  $ foo

  bar

Regular expressions:

  $ echo foobarbaz

  foobar.* (re)

  $ echo barbazquux

  .*quux.* (re)

Globs:

  $ printf '* \\foobarbaz {10}\n'

  \* \\fo?bar* {10} (glob)

Literal match ending in " (re)":

  $ echo 'foo (re)'

  foo (re)

Exit code:

  $ (exit 1) 

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