char2nr("ABC")	" returns 65
			echo char2nr("á")	" returns 225
			echo char2nr("á"[0])	" returns 195
			echo char2nr("\<M-x>")	" returns 128
<		Non-ASCII characters are always treated as UTF-8 characters.
		{utf8} is ignored, it exists only for backwards-compatibility.
		A combining character is a separate character.
		|nr2char()| does the opposite.

		Returns 0 if {string} is not a |String|.

                Parameters: ~
                  • {string} (`string`)
                  • {utf8} (`any?`)

                Return: ~
                  (`0|1`)

charclass({string})                                                *charclass()*
		Return the character class of the first character in {string}.
		The character class is one of:
			0	blank
			1	punctuation
			2	word character (depends on 'iskeyword')
			3	emoji
			other	specific Unicode class
		The class is used in patterns and word motions.
		Returns 0 if {string} is not a |String|.

                Parameters: ~
                  • {string} (`string`)

                Return: ~
                  (`0|1|2|3|'other'`)

charcol({expr} [, {winid}])                                          *charcol()*
		Same as |col()| but returns the character index of the column
		position given with {expr} instead of the byte position.

		Example:
		With the cursor on '세' in line 5 with text "여보세요": >vim
			echo charcol('.')	" returns 3
			echo col('.')		" returns 7
<

                Parameters: ~
                  • {expr} (`string|any[]`)
                  • {winid} (`integer?`)

                Return: ~
                  (`integer`)

charidx({string}, {idx} [, {countcc} [, {utf16}]])                   *charidx()*
		Return the character index of the byte at {idx} in {string}.
		The index of the first character is zero.
		If there are no multibyte characters the returned value is
		equal to {idx}.

		When {countcc} is omitted or |FALSE|, then composing characters
		are not counted separately, their byte length is added to the
		preceding base character.
		When {countcc} is |TRUE|, then composing characters are
		counted as separate characters.

		When {utf16} is present and TRUE, {idx} is used as the UTF-16
		index in the String {expr} instead of as the byte index.

		Returns -1 if the arguments are invalid or if there are less
		than {idx} bytes. If there are exactly {idx} bytes the length
		of the string in characters is returned.

		An error is given and -1 is returned if the first argument is
		not a string, the second argument is not a number or when the
		third argument is present and is not zero or one.

		See |byteidx()| and |byteidxcomp()| for getting the byte index
		from the character index and |utf16idx()| for getting the
		UTF-16 index from the character index.
		Refer to |string-offset-encoding| for more information.
		Examples: >vim
			echo charidx('áb́ć', 3)		" returns 1
			echo charidx('áb́ć', 6, 1)	" returns 4
			echo charidx('áb́ć', 16)		" returns -1
			echo charidx('a😊😊', 4, 0, 1)	" returns 2
<

                Parameters: ~
                  • {string} (`string`)
                  • {idx} (`integer`)
                  • {countcc} (`boolean?`)
                  • {utf16} (`boolean?`)

                Return: ~
                  (`integer`)

chdir({dir})                                                           *chdir()*
		Change the current working directory to {dir}.  The scope of
		the directory change depends on the directory of the current
		window:
			- If the current window has a window-local directory
			  (|:lcd|), then changes the window local directory.
			- Otherwise, if the current tabpage has a local
			  directory (|:tcd|) then changes the tabpage local
			  directory.
			- Otherwise, changes the global directory.
		{dir} must be a String.
		If successful, returns the previous working directory.  Pass
		this to another chdir() to restore the directory.
		On failure, returns an empty string.

		Example: >vim
			let save_dir = chdir(newdir)
			if save_dir !=