Strings

Concatenate

:echom "Hello, " . "world"

Special Characters

:echom "foo\nbar"

^@ is Vim's way of saying "newline character".

Literal Strings

:echom '\n\\'

Vim displays \n\\.

String Functions

:echom len("foo")

:echo split("one,two,three", ",")

:echo join(split("foo bar"), ";")

:echom tolower("Foo")
:echom toupper("Foo")