U+00C4 "Ä" Latin Capital Letter A with Diaeresis Unicode Character
U+00C4 "Ä" Latin Capital Letter A with Diaeresis is a precomposed character that represents the letter A modified by two dots, known as a diaeresis or umlaut, placed above it. It is primarily used in several European languages, such as German, Swedish, Finnish, and Estonian, where it functions as a distinct letter in the alphabet, often indicating a different vowel sound than a plain A. In German, for example, it denotes a fronted vowel sound (like the "e" in "bed") and appears in words like "Mädchen" for "girl." The character can also be used in transliteration or loanwords from these languages, and it has its own unique code point in the Unicode standard, separate from the combination of a plain "A" followed by a combining diaeresis mark.
General Properties
| Code Point | U+00C4 |
| Version Added | 1.1 |
| Name | Latin Capital Letter A with Diaeresis |
| Unicode 1.0 Name | Latin Capital Letter A Diaeresis |
| Block | Latin-1 Supplement |
| General Category | Uppercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Canonical |
| Decomposition Mapping | "A" U+0041 Latin Capital Letter A "̈" U+0308 Combining Diaeresis |
Encodings
| HTML Decimal Encoding | Ä |
| HTML Hex Encoding | Ä |
| UTF-8 Encoding | 0xC3 0x84 |
| UTF-16 Encoding | 0x00C4 |
| UTF-32 Encoding | 0x000000C4 |
| C/C++/Java Escape | \u00c4 |
Unicode Properties
| NFC Quick Check | Yes |
| NFKC Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Alphabetic |
| Uppercase | Yes |
| Simple Lowercase Code Point | "ä" U+00E4 Latin Small Letter A with Diaeresis |
| Lowercase Code Point | "ä" U+00E4 Latin Small Letter A with Diaeresis |
| Simple Case Folding | "ä" U+00E4 Latin Small Letter A with Diaeresis |
| Case Folding | "ä" U+00E4 Latin Small Letter A with Diaeresis |
| Cased | Yes |
| Changes When Casefolded | Yes |
| Changes When Casemapped | Yes |
| Changes When Lowercased | Yes |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "ä" U+00E4 Latin Small Letter A with Diaeresis |
| NFKC Simple Casefold | "ä" U+00E4 Latin Small Letter A with Diaeresis |
| Script | Latin |
| Script Extensions | Latin |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Vertical Orientation | Rotated |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Upper |