To set the numeric base, select one of the buttons described in . FunctionButtonDescriptionBinary BaseBinSets the numeric base to binary, that is, base 2.Octal BaseOctSets the numeric base to octal, that is, base 8.Decimal BaseDecSets the numeric base to decimal, that is, base 10. Decimal is the default numeric base. If you change from Scientific mode to another mode,  automatically sets the numeric base to decimal.Hexadecimal BaseHexSets the numeric base to hexadecimal, that is, base 16.
