| HTML Entity (dec) | ℯ |
| HTML Entity (hex) | ℯ |
| UTF-8 (hex) | 0xe284af / 0xe2 0x84 0xaf (3 bytes) |
| UTF-8 (dec) | 226, 132, 175 (3 bytes) |
| UTF-16-BE (hex) | 0x212f / 0x21 0x2f (2 bytes) |
| UTF-16-BE (dec) | 33, 47 (2 bytes) |
| UTF-32-BE (hex) | 0x212f / 0x00 0x00 0x21 0x2f (4 bytes) |
| UTF-32-BE (dec) | 0, 0, 33, 47 (4 bytes) |
| C/C++/Java source code | "\u212f" |
| Python source code | "\u212f" |