4.4.2.1 Characters

A single character may be written as a single quote immediately followed by that character, or as a single quote immediately followed by that character and another single quote. As an example, either 'a or 'a'.

The assembler accepts escape characters to represent special control characters. As an example, '\n' represents a new-line character. All accepted escape characters are listed in the table below.

Table 4-2. Escape Characters
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.
`\x hex-digits`	Hex character code. All trailing hex digits are combined. Either upper or lower case x works.

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 code is ASCII.