Explanation
DEFtype Statements
Sets the default data type for variables, DEF FN functions, and FUNCTION procedures.Worth knowing
Useful and cross-version information about the programming environments of QBasic, QuickBasic and Visual Basic for DOS.
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DEFSNG Statement
Syntax
| DEFINT letterrange [,letterrange]... |
| DEFLNG letterrange [,letterrange]... |
| DEFSNG letterrange [,letterrange]... |
| DEFDBL letterrange [,letterrange]... |
| DEFSTR letterrange [,letterrange]... |
Description / Parameter(s)
| letterrange | A letter or range of letters (such as A-M). QBasic sets the default data type for variables, DEF FN functions, and FUNCTION procedures whose names begin with the specified letter or letters as follows: | ||||||||||||
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| A data-type suffix (%, &, !, #, or $) always takes precedence over a DEFtype statement. | |||||||||||||
| Single-precision is the default data type if you do not specify a DEFtype statement. | |||||||||||||
| After you specify a DEFtype statement in your program, QBasic automatically inserts a corresponding DEFtype statement in each procedure you create. | |||||||||||||
Example
DEFDBL A-Z
a = SQR(3)
PRINT "Square root of 3 = "; a