Ä

Unicode contains the Ä at code points U+00C4 (uppercase) and U+00E4 (lowercase). In ISO 8859-1, the letter is encoded in the same places.

Older programs, which are still based on US-ASCII, for example, cannot represent ä or Ä. Here these characters are usually replaced by an ae or AE.

In TeX you can insert the Ä in text typesetting with the commands \"A and \"a or in graphical typesetting with \ddot A and \ddot a. With the package german.sty or with the package babel the input of the German umlauts to "a, "o and "u is simplified. By specifying a suitable option for the inputenc package, it is also possible to enter the umlauts directly in text mode.

In HTML there are the named characters Ä for the Ä and ä for the ä.

On Windows, you can also enter the capital Ä by using the combination Alt+142, and the lowercase ä by using the combination Alt+132. On Linux systems with newer versions of X11, the letter can be entered by Compose, ⇧Shift, 2a.

The old German Aͤ/aͤ can be set with U+0364 COMBINING LATIN SMALL LETTER E (Unicode block Combining diacritical marks - ͤ following the respective letter).