&O - QB64Official/qb64 GitHub Wiki

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

Syntax

a& = &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 "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 & after the number. Example: &O100000& = 32768

Example(s)

Example: The maximum octal values of decimal value -1 in each numerical type are:


c&& = -1: d& = -1: e% = -1: f%% = -1
oc$ = OCT$(f%%)
PRINT "Max octal _BYTE = "; oc$; " with"; LEN(oc$); "digits ="; VAL("&O" + oc$)
oc$ = OCT$(e%)
PRINT "Max octal INTEGER = "; oc$; " with"; LEN(oc$); "digits ="; VAL("&O" + oc$)
oc$ = OCT$(d&)
PRINT "Max octal LONG = "; oc$; " with"; LEN(oc$); "digits ="; VAL("&O}}" + oc$)
oc$ = OCT$(c&&)
PRINT "Max octal _INTEGER64 = "; oc$; " with"; LEN(oc$); "digits ="; VAL("&O" + oc$)



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

See Also