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Version: 7.0

IF ... THEN operator

The IF ... THEN operator creates an action that implements branching with one condition (single form).

Syntax​

IF condition 
THEN action
[ELSE alternativeAction]

Description​

The IF ... THEN operator creates an action that implements branching with one condition. When this action is executed, the condition is checked: if it is met, the action specified after the keyword THEN is called; if it is not met, the action specified after the keyword ELSE is called (if this block is specified).

Parameters​

  • condition

    Expression defining a condition. If the value of the expression does not equal NULL, then the condition is met and the action specified after the keyword THEN is called.

  • action

    Context-dependent operator that describes the action that will be executed when the corresponding condition is met.

  • alternativeAction

    Context-dependent operator that describes an action that will be executed if the condition is not met.

Examples​

// Action that compares the value of the count property to 3 and displays a message to the user
moreThan3(obj)  {
    IF count(obj) > 3 THEN
        MESSAGE '>3';
    ELSE
        MESSAGE '<=3';
}

checkNullName (Store st) {
    IF NOT name(st) THEN
        MESSAGE 'Name is null';
}