4.3.2.1 Characters

A character constant can be written as the character preceded by a single quote character, for example, 'z, or as the character enclosed by single quote characters, for example, 'z'.

Special control characters an be specified by using an escape sequence. The assembler accepts the following escape characters.

Table 4-1. Special Characters and Usages
Escape Character	Description	Hex Value
`\a`	Bell (alert) character	07
`\b`	Backspace character	08
`\f`	Form-feed character	0C
`\n`	New-line character	0A
`\r`	Carriage return character	0D
`\t`	Horizontal tab character	09
`\v`	Vertical tab character	0B
`\\`	Backslash	5C
`\?`	Question mark character	3F
`\"`	Double quote character	22
`\digit digit digit`	Octal character code. The numeric code is 3 octal digits (`0` - `7`).
`\x hex-digits` or `\X hex-digits`	Hex character code. All trailing hexadecimal digits (`0` - `9`, `a` - `f`, or `A` - `F`)are combined.

The value of a character constant in a numeric expression is the machine’s byte-wide code for that character. The assembler assumes your character set is ASCII.