Uint8
conversion-functions uint8
concept
- uint8 is a 8 bits (1 byte) unsigned integer value-type.
- uint8() is a function converting data items or units of other value types to the uint8 value type.
This page describes the uint8() function.
syntax
- uint8(a)
- literal b
definition
uint8(a) results in a 8 bits(1 byte) unsigned integer item converted from item a. The function results for:
- integer data items: the integer value is interpreted as uint8 value, if the value exceeds the allowed value range for the uint8 value type, the resulting value will be null;
- float32/64 data items: the value before the decimal point (so 1.9 will be rounded off to 1 and 2.0 to 2). If the value exceeds the allowed value range for the uint8 value type, the resulting value will be null;
- boolean data items: 1 for True values and 0 for False values;
- string data items, if the value starts with an allowed numeric value for the value type, this value is converted to a uint8 value type. Other characters after the numeric values are ignored. If the string does not start with an allowed numeric value for the value type, the resulting value will be null;
- units, a 8 bits(1 byte) unsigned integer unit of the converted unit.
applies to
- data item or unit with Numeric, uint2, uint4, bool or string value type
since version
- 5.15
- b suffix: since 7.105
example
1. parameter<uint8> uint8Numeric1 := uint8(1);
2. parameter<uint8> uint8Numeric1 := 1b;
3. attribute<uint8> uint8A (ADomain) := uint8(A);
4. attribute<uint8> uint8B (ADomain) := uint8(B);
| A(float32) | B(string) | uint8A | uint8B |
|---|---|---|---|
| 0 | ‘Hello’ | 0 | null |
| 1 | ‘Test’ | 1 | null |
| 1000000 | null | null | null |
| -2.5 | ‘Two words’ | null | null |
| 99.9 | ‘88a’ | 99 | 88 |
ADomain, nr of rows = 5