If_Then

Description

The first step in a conditional construct. The system evaluates the logical expression in the Recognition field of the If_Then step. If the expression evaluates to True, the system runs the steps between the If_Then step and the End_If step or the Else step, if it exists. If the expression evaluates to False, the system jumps to the Else step, if it exists, or to the End_If step if there is no Else step, and continues the run.

If_Then supports these logical operators:

<>, >=, <=, >, <, =

You can use the AND and OR logical operators to specify multiple conditions.

Example

This example shows the use of multiple conditions and nested conditionals:

Type	Action	Recognition	Parameters	Value
Variable	Set_Value	&Integer		3
Conditional	If_Then	&Integer>=1 AND &Integer<=10 OR &Integer=0
Log	Message	Determine if integer is odd or even
Log	Message	Enter first nested conditional
Conditional	If_Then	&Integer=0
Log	Message	Do not divide by 0
Conditional	Else
Variable	Set_Value	&Half=Divide(&Integer|2|dec=1)
Log	Message	Enter second nested conditional
Variable	Set_Value	&Odd=Substr(&Half|3)
Conditional	If_Then	&Odd=5
Log	Message	The number is odd
Conditional	Else
Log	Message	The number is even
Conditional	End_If