An algorithm for an automated greenhouse climate controller is shown below.

Regardless of the environmental readings entered by the user, the same number of OUTPUT instructions will always execute when the algorithm runs.

1  OUTPUT 'Greenhouse climate check initiated.'
2  OUTPUT 'Reading sensor values...'
3  temp ← USERINPUT
4  IF temp > 30 THEN
5      OUTPUT 'Alert: High temperature detected.'
6      humidity ← USERINPUT
7      IF humidity < 40 THEN
8          OUTPUT 'Action: Activating misting system.'
9      ELSE
10         OUTPUT 'Action: Opening main ventilation roof.'
11     ENDIF
12 ELSE
13     OUTPUT 'Temperature within safe range.'
14     soilMoisture ← USERINPUT
15     IF soilMoisture < 20 THEN
16         OUTPUT 'Action: Running drip irrigation.'
17     ELSE
18         OUTPUT 'Action: Monitoring mode active.'
19     ENDIF
20 ENDIF