The convert/octal function converts a decimal number to an octal number. The number must be nonnegative, and can be either an integer or a floating-point number.  In the case of a floating-point number an optional third argument determines the total number of digits of precision in the answer (the default is Digits).

The octal number is returned as a base 10 number consisting of the digits 0 through 7.

$\mathrm{convert}\left(12345\,\mathrm{octal}\right)$

$30071$

$\mathrm{convert}\left(100\,\mathrm{octal}\right)$

$144$