# Alternative Syntax for Binary, Octal, and Hexadecimal Constants

In Intel® Fortran, you can use an alternative syntax for binary, octal, and hexadecimal constants. The following table shows the alternative syntax and equivalents:

Constant | Alternative Syntax | Equivalent
--- | --- | ---
Binary | '0..1'B | B'0..1'
Octal | '0..7'O | O'0..7'
Hexadecimal | '0..F'X X'0..F' | Z'0..F'

You can use a quotation mark (") in place of an apostrophe in all the above syntax forms.

For information on the # syntax for integers not in base 10, see Integer Constants.

Parent topic: Additional Language Features

## See Also

Binary constants
Octal constants
Hexadecimal constants