Single-precision floating-point numbers (or more simply, Single-precision) may be the most versatile numeric type supported by PowerBASIC. Single-precision values can contain decimal points and have a range of +/- 8.43*10^-37 to 3.40*10^38. The type-specifier character for a Single-precision floating-point is: !.

Single-precision variables are identified by following the variable
name with an exclamation point (i.e., *var!*) or by using the DEFSNG
statement as described in the previous discussion of integrals.
You can also declare Single-precision variables using the SINGLE keyword
with the DIM statement. For example:

DIM I AS SINGLE

While Single-precision numbers can represent both enormous and microscopic values, they are limited to six digits of precision. In other words, Single-precision does a good job with figures like $451.21 and $6,411.92, but $671,421.22 cannot be represented exactly because it contains too many digits. Neither can 234.56789 or 0.00123456789. A Single-precision representation will come as close as it can in six digits: $671,421, or 234.568, or 0.00123457. Depending on your application, this rounding off can be a trivial or crippling deficiency. Like most modern compilers, PowerBASIC uses the IEEE standard for all floating-point arithmetic.

C/C++, Delphi, and Visual Basic all offer a single data type that is identical to the PowerBASIC Single-precision variable.

See Also

Currency (@) and Extended-currency (@@)

Double-precision floating-point (#)

Extended-precision floating-point (##)