ASCII 25
ASCII 25 is End of Medium — the control character EM.
Every representation
| Character | EM (not printable) |
| Name | End of Medium |
| Decimal | 25 |
| Hexadecimal | 0x19 |
| Octal | 0031 |
| Binary | 00011001 |
| HTML entity |  |
| Escape sequence | \x19 |
| Unicode | U+0019 |
| Keyboard | Ctrl+Y |
| Group | Control character |
What it is for
Marked the physical end of a tape or other medium.
Where the number comes from
Codes 0 to 31 were reserved for control: instructions to a teleprinter rather than characters to print. Code 25 is Ctrl+Y because the Ctrl key was originally wired to clear the top two bits of whatever you typed, mapping the letter Y at 89 down to 25.
Frequently asked questions
What is ASCII 25?
End of Medium (EM), a control character. In hexadecimal it is 0x19, in octal 0031, and in binary 00011001.
How do I type ASCII 25?
Press Ctrl+Y in a terminal. In a string literal you can write it as \\x19 in most languages.
Is ASCII 25 printable?
No. Codes 0 to 31 and 127 are control characters — they were instructions to a teleprinter rather than marks on paper, and most terminals show nothing for them.
Nearby codes
- ASCII 18 — DC2
- ASCII 19 — DC3
- ASCII 20 — DC4
- ASCII 21 — NAK
- ASCII 22 — SYN
- ASCII 23 — ETB
- ASCII 24 — CAN
- ASCII 26 — SUB
- ASCII 27 — ESC
- ASCII 28 — FS
- ASCII 29 — GS
- ASCII 30 — RS
- ASCII 31 — US
- ASCII 32 — space
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