ASCII 63
ASCII 63 is Question mark, written ?.
Every representation
| Character | ? |
| Name | Question mark |
| Decimal | 63 |
| Hexadecimal | 0x3F |
| Octal | 0077 |
| Binary | 00111111 |
| HTML entity | ? |
| Escape sequence | \x3F |
| Unicode | U+003F |
| Group | Punctuation or symbol |
What it is for
Question mark. Begins the query string in a URL, and means "zero or one" in a regular expression.
Where the number comes from
Codes 32 to 126 hold the printable characters. The punctuation was distributed around the letters and digits so that the most common characters fell into positions that were convenient for the teleprinter keyboards of the time.
Frequently asked questions
What is ASCII 63?
Question mark, the character ?. In hexadecimal it is 0x3F, in octal 0077, and in binary 00111111.
How do I type ASCII 63?
Type ? directly. In a string literal it can also be written \\x3F, and in HTML as ?.
Is ASCII 63 printable?
Yes. Codes 32 to 126 are the printable range, which is every character ASCII can actually display.
Nearby codes
- ASCII 56 — 8
- ASCII 57 — 9
- ASCII 58 — :
- ASCII 59 — ;
- ASCII 60 — <
- ASCII 61 — =
- ASCII 62 — >
- ASCII 64 — @
- ASCII 65 — A
- ASCII 66 — B
- ASCII 67 — C
- ASCII 68 — D
- ASCII 69 — E
- ASCII 70 — F
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