Boolean Data Type
Holds values that can be only true or false.
Instructions
- Default value
- When you declare a variable of type
Booleanand do not initialize it, its value is false. - Type characters
Booleanhas no type characters.
Type conversions
When you change a Boolean value to an integer value, the result can be different with different implementations.
ViviFire supplies two integer constants, %TRUE and %FALSE, which hold an implementation's values for true and false.
Shared methods and properties
Boolean.Default As Boolean- Returns the default value,
Boolean.FALSE. Boolean.False As Boolean- Returns the value that is false.
The equivalent integer constant is
%FALSE. Boolean.FalseString As String- Returns a string value of
"False". Boolean.Parse(str As String) As Boolean- Tries to parse a string that shows as a Boolean.
- Permitted strings include
Boolean.FalseStringandBoolean.TrueString(letter case ignored) and integer values. It parses"0"as false, and all other integers as true. Boolean.Size As Boolean- Returns the number of available bytes.
Boolean.True As Boolean- Returns the value that is true.
The equivalent integer constant is
%TRUE. Boolean.TrueString As String- Returns a string value of
"True".
Examples
Dim foo As Boolean