Guarded Statements

If assignment or append statements must be executed conditionally, the following syntax can be used:

Syntax	`set object = expression if booleanGuardExpression;` `append object to arrayExpression if booleanGuardExpression;`
Semantics	The set and append statements are applied only if the boolean guard expression evaluates to true.
Substitutables	`object`	Any object name.
	`expression`	A valid expression.
	`arrayExpression`	An expression evaluating to an array.
	`booleanGuardExpression`	Any expression evaluating to a boolean.
Examples	NONE `set x = "abc" if y > 10;`