Control flow and defensive input handling
24 min · BeginnerUnderstand the concept
Conditional logic can handle expected ranges, failures and fallbacks. A robust system never interprets a missing or corrupt measurement as valid without checking. Fail-safe behavior is application-specific and should be designed before deployment.
Read the associated publisher material for deeper derivations, lectures and problem sets. This summary is an independent Harderware explanation.
Your exercise
Describe behavior for a sensor that returns 22, null, -999 and a nonnumeric string. Write tests for each input.
Practice in simulation or at safe low voltage unless supervised by qualified personnel. Follow official equipment safety guidance.
Record your engineering notes
Capture a hypothesis, your observations, test evidence, failure cases or the next experiment. These notes stay in your browser unless you export them.
Knowledge check
What is the best response to a missing safety-relevant measurement?
Practice quizzes are formative and can be retried. Answers are evaluated in your browser; they are not proctored exams.