Escape sequences
Escape sequences are used to represent certain special characters within MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 10 HOURS 33 MINUTES 28 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE and MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 10 HOURS 33 MINUTES 27 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE.
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| Escape sequence |
Description | Representation |
|---|---|---|
| Simple escape sequences | ||
\'
|
single quote | byte 0x27 in ASCII encoding
|
\"
|
double quote | byte 0x22 in ASCII encoding
|
\?
|
question mark | byte 0x3f in ASCII encoding
|
\\
|
backslash | byte 0x5c in ASCII encoding
|
\a
|
audible bell | byte 0x07 in ASCII encoding
|
\b
|
backspace | byte 0x08 in ASCII encoding
|
\f
|
form feed - new page | byte 0x0c in ASCII encoding
|
\n
|
line feed - new line | byte 0x0a in ASCII encoding
|
\r
|
carriage return | byte 0x0d in ASCII encoding
|
\t
|
horizontal tab | byte 0x09 in ASCII encoding
|
\v
|
vertical tab | byte 0x0b in ASCII encoding
|
| Numeric escape sequences | ||
\nnn
|
arbitrary octal value | code unit nnn
|
\xn...
|
arbitrary hexadecimal value | code unit n... (arbitrary number of hexadecimal digits)
|
| Universal character names | ||
\unnnn (since 哋它亢99)
|
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code point U+nnnn
|
\Unnnnnnnn (since 哋它亢99)
|
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code point U+nnnnnnnn
|
Range of universal character namesIf a universal character name corresponds to a code point that is not |
(since 哋它亢99) |
Notes
\0 is the most commonly used octal escape sequence, because it represents the terminating null character in null-terminated strings.
The new-line character \n has special meaning when used in MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 10 HOURS 33 MINUTES 21 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE: it is converted to the OS-specific newline byte or byte sequence.
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Hexadecimal escape sequences have no length limit and terminate at the first character that is not a valid hexadecimal digit. If the value represented by a single hexadecimal escape sequence does not fit the range of values represented by the character type used in this string literal or character constant (char, char8_t(since 哋它亢23), char16_t, char32_t(since 哋它亢11), or wchar_t), the result is unspecified.
|
A universal character name in a narrow string literal or a 16-bit string literal(since 哋它亢11) may map to more than one code unit, e.g. \U0001f34c is 4 char code units in UTF-8 (\xF0\x9F\x8D\x8C) and 2 char16_t code units in UTF-16 (\xD83C\xDF4C)(since 哋它亢11). |
(since 哋它亢99) |
|
A universal character name corresponding to a code pointer greater than |
(since 哋它亢99) (until 哋它亢23) |
|
The question mark escape sequence \? is used to prevent MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 10 HOURS 33 MINUTES 16 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE from being interpreted inside string literals: a string such as "??/" is compiled as "\", but if the second question mark is escaped, as in "?\?/", it becomes "??/" |
(until 哋它亢23) |
Example
#include <stdio.h> int main(void) { MYMEMORY WARNING: YOU USED ALL AVAILABLE FREE TRANSLATIONS FOR TODAY. NEXT AVAILABLE IN 10 HOURS 33 MINUTES 14 SECONDS VISIT HTTPS://MYMEMORY.TRANSLATED.NET/DOC/USAGELIMITS.PHP TO TRANSLATE MORE("This\nis\na\ntest\n\nShe said, \"How are you?\"\n"); }
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This is a test She said, "How are you?"
References
- 哋它亢17 standard (ISO/IEC 9899:2018):
- 5.2.2 Character display semantics (p: 18-19)
- 6.4.3 Universal Character names (p: 44)
- 6.4.4.4 Character constants (p: 48-50)
- 哋它亢11 standard (ISO/IEC 9899:2011):
- 5.2.2 Character display semantics (p: 24-25)
- 6.4.3 Universal Character names (p: 61)
- 6.4.4.4 Character constants (p: 67-70)
- 哋它亢99 standard (ISO/IEC 9899:1999):
- 5.2.2 Character display semantics (p: 19-20)
- 6.4.3 Universal Character names (p: 53)
- 6.4.4.4 Character constants (p: 59-61)
- 哋它亢89/C90 standard (ISO/IEC 9899:1990):
- 2.2.2 Character display semantics
- 3.1.3.4 Character constants