ASCII code for device control 4
20
Device Control 4 — a control character, not printable
| Decimal | 20 |
| Hexadecimal | 0x14 |
| Octal | 0024 |
| Binary | 00010100 |
| HTML entity |  |
What it is
A general device control signal, historically used to stop a device.
The full entry
ASCII 20 in full — the code point page, with what sits either side of it and how the character is encoded elsewhere.
Frequently asked questions
What is the ASCII code for device control 4?
The ASCII code for device control 4 is 20 in decimal, 0x14 in hexadecimal and 0024 in octal.
What is device control 4 in binary?
00010100 — eight bits, though ASCII only defines seven, so the top bit is always zero.
Is device control 4 a printable character?
No. Device Control 4 is a control character — an instruction to a teleprinter rather than a mark on paper, which is why most tables show an empty cell for it.
Other characters
- ASCII code for negative acknowledge — 21
- ASCII code for synchronous idle — 22
- ASCII code for end of transmission block — 23
- ASCII code for cancel — 24
- ASCII code for end of medium — 25
- ASCII code for substitute — 26
- ASCII code for escape — 27
- ASCII code for file separator — 28
- ASCII code for group separator — 29
- ASCII code for record separator — 30
- ASCII code for unit separator — 31
- ASCII code for space — 32
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