What is the use of \n in c++

The escape character "\n" functions as a newline character in C, which is used to force a newline in text output so that the text output wraps to the next line. It is also used to create multiline strings, control output formats, and perform file writing operations.

The role of \n in C

In C, the escape character "\n" represents a newline character, used to force line breaks in text output.

Uses

"\n" has the following main uses:

• Wrap text: in a string Use "\n" to wrap text output to the next line. For example:

<code class="cpp">cout << "行 1" << "\n" << "行 2";</code>

Output:

<code>行 1
行 2</code>

• Creating a multi-line string: Can be done by using "\n" in the string literal Create a multiline string. For example:

<code class="cpp">string paragraph = "第 1 段\n"
                   "第 2 段\n"
                   "第 3 段";</code>

• Control output format: "\n" can be used to format text output, such as aligning or delimiting text. For example:

<code class="cpp">cout << left << setw(20) << "姓名" << "\n"
     << left << setw(20) << "邮箱";</code>

Output:

<code>         姓名           邮箱</code>

• File writing: When writing a file, "\n" is used to write data The next line of the file. For example:

<code class="cpp">ofstream file("output.txt");
file << "行 1" << "\n" << "行 2";</code>

File content:

<code>行 1
行 2</code>

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