Mikroelektronika MIKROE-350 Fiche De Données

Literals are tokens representing fixed numeric or character values.

The data type of a constant is deduced by the compiler using such clues as numer-
ic value and format used in the source code.

Integral values can be represented in decimal, hexadecimal or binary notation.

In decimal notation, numerals are represented as a sequence of digits (without com-
mas, spaces or dots), with optional prefix + or - operator to indicate the sign. Values
default to positive (

6258

is equivalent to 

+6258

).

The dollar-sign prefix (

$

) or the prefix 

0x

indicates a hexadecimal numeral (for

example, 

$8F

or 

0x8F

).

The percent-sign prefix (

%

) indicates a binary numeral (for example, 

%0101

).

Here are some examples:

11      ' decimal literal
$11     ' hex literal, equals decimal 17
0x11    ' hex literal, equals decimal 17

%11     ' binary literal, equals decimal 3

The allowed range of values is imposed by the largest data type in mikroBasic PRO
for AVR – 

longword

. The compiler will report an error if the literal exceeds

4294967295

(

$FFFFFFFF

).

A floating-point value consists of:

- Decimal integer 
- Decimal point 
- Decimal fraction 
- e or E and a signed integer exponent (optional) 

You can omit either decimal integer or decimal fraction (but not both).

Negative floating constants are taken as positive constants with the unary operator
minus (-) prefixed.

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- SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD

CHAPTER 5