| Description: | Conditionally Execute Statements. This statement executes a statement if the condition parameter is true. |
| Returns: | Nothing |
Usage:  |
Script only. |
| Function Groups: | Logic Control |
| Related to: | Ternary Operator (IfElse) | Cond | Execute | IfElse |
| Format: |
IfThen(Condition, Expression1, Expression2, ...) |
| Parameters: |
| Condition |
| Required. An expression that will indicate whether the Expression parameters are executed. If this is true, the Expression parameters will be executed. |
| Expression1, Expression2, ... default } |
| Required. Any statements to be executed when Condition is true. Any number of Expression parameters may be listed. They are executed once in the order that they are listed. |
| Comments: | This statement may only appear in a script. |
Example:
If 1 Main;
[
IfThen(Valid(tankPtr) && fluidLevel > 1000,
startPump = 1,
activeTankNum++,
msg = "Changing tanks...");
]
The statement in the script will test to see if tankPtr exists (is valid) and if fluidLevel > 1000, if these conditions are both true, the series of actions will be taken. VTScada does not use short-circuit evaluation. Both parts of the condition will always be checked (and evaluated if required).
