Documentation
ISNAN
Function name
ISNAN
ST call
PROGRAM ISNAN_DEMO
VAR
REAL1,REAL2: REAL;
END_VAR
REAL2:= ISNAN(REAL1);
END_PROGRAM
Description
Compares the input variable value with NaN (Not-A-Number, i.e. the value does not represent any valid real number). Returns TRUE, if the value is NaN.
Inputs
| Input | Type | Description |
|---|---|---|
| IN | ANY_REAL | Input value |
Outputs
| Output | Type | Description |
|---|---|---|
| => | BOOL | Output value |
Application example
