# Octal Constants

An octal constant is an alternative way to represent numeric constants. An octal constant takes one of the following forms:

O'd[d...]'

O"d[d...]"

d | Is an octal (base 8) digit (0 through 7).

You can specify up to 128 bits (43 octal digits) in octal constants.

## Examples

Valid Octal Constants
`O'07737'`
`O"1"`

Invalid Octal Constants
`O'7782'` | The character 8 is invalid.
`O7772'` | No apostrophe after the O.
`"0737"` | No O before the first quotation mark.

Parent topic: Binary, Octal, Hexadecimal, and Hollerith Constants

## See Also

Alternative Syntax for Binary, Octal, and Hexadecimal Constants