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C Language Programming Library Reference Guide

Characters - Escape Sequences

The following escape sequences allow special characters to be put into the source code.

Escape Sequence	Name	Meaning
`\a`	Alert	Produces an audible or visible alert.
`\b`	Backspace	Moves the cursor back one position (non-destructive).
`\f`	Form Feed	Moves the cursor to the first position of the next page.
`\n`	New Line	Moves the cursor to the first position of the next line.
`\r`	Carriage Return	Moves the cursor to the first position of the current line.
`\t`	Horizontal Tab	Moves the cursor to the next horizontal tabular position.
`\v`	Vertical Tab	Moves the cursor to the next vertical tabular position.
`\'`		Produces a single quote.
`\"`		Produces a double quote.
`\?`		Produces a question mark.
`\\`		Produces a single backslash.
`\0`		Produces a null character.
`\`ddd		Defines one character by the octal digits (base-8 number). Multiple characters may be defined in the same escape sequence, but the value is implementation-specific (see examples).
`\x`dd		Defines one character by the hexadecimal digit (base-16 number).

Examples:

printf("\12");
Produces the decimal character 10 (x0A Hex).

printf("\xFF");
Produces the decimal character -1 or 255 (depending on sign).

printf("\x123");
Produces a single character (value is undefined). May cause errors.

printf("\0222");
Produces two characters whose values are implementation-specific.

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