Bool
conversion-functions bool
concept
- bool is a 1 bits sub-byte-element, with as possible values: True and False.
- bool() is a function converting data items or units of other value types to the bool value type.
This page describes the bool() function.
syntax
- bool(a)
definition
bool(a) results in a boolean (True or False) item converted from item a. The function results for:
- numeric data items in True for non zero values and False for zero values of data-item a;
- string data items in True for all values starting with the character “T” and False for other values of data item a.
- units, a boolean (1 bit) unit of the converted unit.
applies to
- data item or unit with Numeric, uint2, uint4 or string value type
example
1. attribute<bool> boolA (ADomain) := bool(A);
2. attribute<bool> boolB (ADomain) := bool(B);
| A(float32) | B(string) | boolA | boolB |
|---|---|---|---|
| 0 | ‘Hello’ | False | False |
| 1 | ‘Test’ | True | True |
| 1000000 | null | True | False |
| -2.5 | ‘Two words’ | True | True |
| 99.9 | ‘88a’ | True | False |
ADomain, nr of rows = 5