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| Keyword | Abbreviation | Token (hex) | Version(s) | Classification |
| DEC | none | D1 | 3.5,7.0 | Function |
| COLLECT | CO{Shift+L} | D1 | 4.x | Command and Statement |
DEC ( hexadecimal )
| Parameters | Type | Legal Value(s) | Default Value | Note(s) |
| hexadecimal | String | 1 to 4 hexadecimal digits | | spaces are skipped and aren't counted |
| Returns | Type | Value(s) | Note(s) |
| decimal | Integer | 0 to 65535 | |
Return the decimal value of a number specified as hexadecimal.
The DEC function parses a text string, hexidecimal, as a radix-16 number
and returns its 'normal' (decimal) value. It is unfortunate it won't process fractional values.
Another limitation is it only processes up to 4 characters, so the maximum value ("FFFF") possible
to be returned is 65535. Yet another issue is that many BASIC operations involving integers work
with signed integers, but this function can only generate unsigned integers.
I won't go into details here, but suffice it to say, a hexadecimal number consists
of normal Arabic digits 0 to 9, plus 6 more digits represented by Latin letters A to F.
The hexidecimal number must be specified as a string, otherwise a TYPE MISMATCH ERROR is generated.
Unlike the similar VAL function, this one is a cry-baby. The only non-hexadecimal character allowed
is a space. As stated above, a maximum of four digits are allowed.
Any more digits or non-valid characters generates an ILLEGAL QUANTITY ERROR.
It is handy for quick calculations in direct mode, but it requires the use
of an error TRAP routine if you want your program to be robust against data entry errors.
Examples:
PRINT DEC("100.8")
?ILLEGAL QUANTITY ERROR
READY.
PRINT DEC("100")
256
READY.
PRINT DEC(100)
?TYPE MISMATCH ERROR
READY.
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ASC, INSTR, LEN,
VAL
CHR$, ERR$, HEX$,
STR$
GET, INPUT, TRAP
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