Repeat until the input is correct
Write a loop which prompts for a number greater than
100. If the visitor enters another number – ask him to input again.
The loop must ask for a number until either the visitor enters a number greater than
100 or cancels the input/enters an empty line.
Here we can assume that the visitor only inputs numbers. There’s no need to implement a special handling for a non-numeric input in this task.
do..while repeats while both checks are truthy:
- The check for
num <= 100– that is, the entered value is still not greater than
- The check
&& numis false when
nullor a empty string. Then the
whileloop stops too.
num <= 100 is
true, so without the 2nd check the loop wouldn’t stop if the user clicks CANCEL. Both checks are required.