Logical Expressions

Logical expressions are statements combining variables, values, and operators (like AND, OR, NOT, <, >, =) that evaluate to a boolean of true or false.

Below are examples of simple and complex logic expressions.

Simple Expressions

You can embed Logical Expressions inside if, if:else, and while actions. When being used in these task actions, they don't need to be surrounded by .

The following gives you some examples of what can be done using Logical Expressions.

1 == din[1].state (This checks if input 1 on the JNIOR is on)

100 <= temp[1].fahrenheit (This checks if the temperature from a temperature probe connected to the JNIOR is recording farhenheit above 100 degrees.)

You can use Signal Names in place of some expressions.

1 == fire_alarm (fire_alarm represents a name for a signal that uses input 1 in the signals tab.)

100 <= outside_temp_f (outside_temp_f represents a name for a signal that uses a temperature probe in the signals tab.)

Complex Expressions

More complex expressions can be implemented using operators such as && (AND), || (OR) and parenthesis.

Using the && operator inbetween two expressions makes it so that both expressions must both be true for the entire statment to return true, or else it returns false.

rout[2].state && rout[3].state

This statment will only evaluate as true, if both output 2 AND output 3 on the JNIOR are on.

Using the || operator inbetween two expressions makes it so that at least one of the expressions must be true for the entire statment to return true, or else it returns false.

rout[2].state || rout[3].state

This statment will only evaluate as true, if either output 2 OR output 3 on the JNIOR are on.

(rout[2].state && rout[3].state) || rout[4].state

This statement showcases using both expressions being used together.

This statement will only return true either output 4 is on, OR if output 2 AND output 3 are on