| HTML Entity (dec) | ↈ |
| HTML Entity (hex) | ↈ |
| UTF-8 (hex) | 0xe28688 / 0xe2 0x86 0x88 (3 bytes) |
| UTF-8 (dec) | 226, 134, 136 (3 bytes) |
| UTF-16-BE (hex) | 0x2188 / 0x21 0x88 (2 bytes) |
| UTF-16-BE (dec) | 33, 136 (2 bytes) |
| UTF-32-BE (hex) | 0x2188 / 0x00 0x00 0x21 0x88 (4 bytes) |
| UTF-32-BE (dec) | 0, 0, 33, 136 (4 bytes) |
| C/C++/Java source code | "\u2188" |
| Python source code | "\u2188" |