The '''&amp;O''' prefix denotes that a integer value is expressed in an Octal base 8 format.


{{PageSyntax}} a&amp; = &amp;O12345671234


* The base eight numbering system only uses octal digit values of 0 to 7.
* Leading zero values '''can''' be omitted as they add nothing to the return value.
* Decimal values returned can be any '''signed''' [[INTEGER]], [[LONG]] integer, or [[_INTEGER64]] value so use those type of variables when converting directly as shown above. The program [[ERROR Codes|"overflow"]] error limits are listed as:
:: * [[INTEGER]]: 6 octal digits or a decimal value range from -32,768 to 32,767
:: * [[LONG]]: 11 octal digits or a decimal value range from -2,147,483,648 to 2,147,483,647
:: * [[_INTEGER64]]: 22 octal digits or decimal values from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807.
* [[LONG]] Octal values can be expressed by appending &amp; after the number. Example: &amp;O100000&amp; = 32768


''Example:'' The maximum octal values of decimal value  -1 in each numerical type are:
{{CodeStart}}
c&amp;&amp; = -1: d&amp; = -1: e% = -1: f%% = -1
oc$ = {{Cl|OCT$}}(f%%)
{{Cl|PRINT}} "Max octal {{Cl|_BYTE}} = "; oc$; " with"; {{Cl|LEN}}(oc$); "digits ="; {{Cl|VAL}}("{{Cl|&amp;O}}" + oc$)
oc$ = {{Cl|OCT$}}(e%)
{{Cl|PRINT}} "Max octal {{Cl|INTEGER}} = "; oc$; " with"; {{Cl|LEN}}(oc$); "digits ="; {{Cl|VAL}}("{{Cl|&amp;O}}" + oc$)
oc$ = {{Cl|OCT$}}(d&amp;)
{{Cl|PRINT}} "Max octal {{Cl|LONG}} = "; oc$; " with"; {{Cl|LEN}}(oc$); "digits ="; {{Cl|VAL}}("{{Cl|&amp;O}}" + oc$)
oc$ = {{Cl|OCT$}}(c&amp;&amp;)
{{Cl|PRINT}} "Max octal {{Cl|_INTEGER64}} = "; oc$; " with"; {{Cl|LEN}}(oc$); "digits ="; {{Cl|VAL}}("{{Cl|&amp;O}}" + oc$) '' ''
{{CodeEnd}}
{{OutputStart}}Max octal _BYTE = 377 with 3 digits = 255
Max octal INTEGER = 177777 with 6 digits = 65535
Max octal LONG = 37777777777 with 11 digits = 4294967295
Max octal _INTEGER64 = 1777777777777777777777 with 22 digits =-1
{{OutputEnd}}


''See also:''
* [[OCT$]], [[HEX$]], [[VAL]]
* [[&amp;B]] (binary), [[&amp;H]] (hexadecimal)
* [[Base Comparisons]]


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