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Related Syntax | Related Concepts | ||||
constant |
true, false |
Purpose
True and false are Boolean values that you can use to set or test the value of switch variables:
process local switch fred local switch barney variable initial-size 3 initial {true, false, true} set fred to true do when fred = true output "Switch fred is true!%n" else output "Switch fred is false!%n" done set barney[3] to false do when barney[3] = false output "Switch barney[3] is false!%n" else output "Switch barney[3] is true!%n" done ; Output: "Switch fred is true! ; Switch barney[3] is false!"
Note that switch variables return a true or false value directly so that do when fred = true
and do when fred
do the same thing. Similarly, do when fred = false
does the same thing as do unless fred
.
While all switches default to false, you should explicitly set the value of all variables before using them. This makes your programs easier to read and helps avoid errors.
Related Syntax |
Related Concepts |
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