What determines the number of times a sentinel-controlled while loop executes?
Understand the Problem
The question is asking for the factors that influence how many times a sentinel-controlled while loop runs in programming. It presents four options to choose from, each representing a different influence on loop execution.
Answer
It is determined by a sentinel value that signals the loop to exit.
A sentinel-controlled while loop continues executing until a specific sentinel value is encountered, which determines when the loop exits.
Answer for screen readers
A sentinel-controlled while loop continues executing until a specific sentinel value is encountered, which determines when the loop exits.
More Information
A sentinel-controlled loop does not have a predetermined number of iterations. Instead, the loop continues until a special sentinel value is encountered. This design allows the loop to process varying amounts of data.
Tips
A common mistake is assuming the loop will execute a fixed number of times without specifying a sentinel to end it.
Sources
- while loop - sentinel value - Python Classroom - pythonclassroom.com
