A Boolean value represents whether something is true or false. ColdFusion has two special constants--True and False--to represent these values. For example, the Boolean expression 1 IS 1 evaluates to True. The expression "Monkey" CONTAINS "Money" evaluates to False.

You can use Boolean constants directly in expressions, as in the following example:

<cfset UserHasBeenHere = True>

Oct 17, 2008: Corrected
In Boolean expressions, True, nonzero numbers, and the strings "Yes", "1|", "True" are equivalent; and False, 0, and the strings "No", "0", and "False" are equivalent.

Boolean evaluation is not case-sensitive. For example, True, TRUE, and true are equivalent.