A single-precision REAL constant occupies four bytes of memory. The number of digits is unlimited, but typically only the leftmost seven digits are significant.
IEEE* S_floating format is used.
Note that compiler option real-size can affect REAL data.
Examples
The following examples show valid and invalid REAL(4) constants:
| Valid | |
3.14159 |
|
3.14159_4 |
|
621712._4 |
|
-.00127 |
|
+5.0E3 |
|
2E-3_4 |
|
| Invalid | Explanation |
1,234,567. |
Commas not allowed. |
325E-47 |
Too small for REAL; this is a valid DOUBLE PRECISION constant. |
-47.E47 |
Too large for REAL; this is a valid DOUBLE PRECISION constant. |
625._6 |
6 is not a valid kind for reals. |
100 |
Decimal point missing; this is a valid integer constant. |
$25.00 |
Special character not allowed. |
See Also