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@ ever4st
2025-01-23 13:59:37
* **UTF-16 Encoding:** The `echo` command in a DOS environment (like the command prompt) typically defaults to writing output to a file using UTF-16 encoding.
* **Byte Order Mark (BOM):** UTF-16 uses a Byte Order Mark (BOM) at the beginning of the file to indicate the endianness (byte order) of the encoding.
* **FF FE:** This specific byte order (FF FE) signifies **little-endian** encoding, where the least significant byte of each 16-bit code unit comes first.
* **2 Coding Pairs:** In UTF-16, each character is represented by two bytes (a code unit).
**Example:**
1. **Execution:**
- Open a command prompt window.
- Type the following command:
```
echo "something" > file.txt
```
- Press Enter.
2. **File Contents:**
- The `file.txt` will be created with the following:
- **FF FE:** BOM for little-endian UTF-16.
- Two bytes representing the letter 's'.
- Two bytes representing the letter 'o'.
- And so on, for each character in "something".
**Note:**
* The specific behavior might vary slightly depending on the exact version of Windows and the regional settings.
* You can often configure the command prompt to use different encodings, such as UTF-8, if needed.