You can specify floating-point numbers as REAL and LREAL constants either in decimal notation or exponential notation with mantissa and exponent.
The decimal point serves as the decimal separator according to the International System
of Units (English).
Syntax of exponential notation
<significand> e | E <exponent>
exponent : -44..38 // REAL exponent : -324..308 // LREAL
Example
REAL literal
|
7.4 |
Decimal number 7,4 with a comma returns a compiler error |
|
1/3.0 |
Decimal fraction for 0.333333343 Note: In the case of division of integer types, the result remains an integer type. In this case, the value is rounded. For example, 1/3 yields 0 as the result. |
|
1.64e+009 |
Exponential notation |
|
-3.402823e+38 |
Smallest number |
|
-1E-44 |
Largest negative number |
|
1.0E-44 |
Smallest positive number |
|
3.402823e+38 |
Largest number |
LREAL literal
|
-1.7976931348623157E+308 |
Smallest number |
|
-4.94065645841247E-324 |
Largest negative number |
|
4.94065645841247E-324 |
Smallest positive number |
|
1.7976931348623157E+308 |
Largest number |
For more information, see: ⮫ “Data Type: REAL, LREAL ”