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Escape Sequences in Strings
Some characters are impossible to type as-is inside a string. Escape sequences solve that: a backslash \ followed by a letter or symbol.
The classic escapes
\\prints a backslash.\"prints a double quote.- `
` prints a newline.
\tprints a tab.\0is the null character (used by C-style strings).
In action
cpp
cout << "She said \"hi\"." << endl;
// She said "hi".
cout << "line one
line two" << endl;
// line one
// line two
cout << "col1\tcol2" << endl;
// col1 col2
Why the backslash?
A string is bounded by double quotes. To place a real quote inside, you tell the compiler "this quote is text, not the end of the string" - that is what \" does. And because the backslash itself starts escapes, a real backslash is written as \\.
Escape table
| Escape | Meaning |
|---|---|
\\ | Backslash |
\" | Double quote |
` | New line |
TL;DR
- Escapes start with a backslash.
\"puts a quote inside a string.- `
and \t` format output.
\\writes one backslash.\0is the null character.