I recently did a lab where I had to search a string for the substring "mis". I kept getting stuck in an endless loop while trying to figure it out. To stop the loop, I used a boolean variable, which I set to false initially. In my while loop condition, I included `!isFound`. When the substring was found, I set the boolean to true, which allowed the loop to exit. It worked, but I'm confused about why setting the boolean to false along with using the `not (!) ` operator worked. Could someone help me understand the logic behind it? Also, I'd appreciate it if someone could review my code and suggest any improvements!
3 Answers
I noticed you posted some code. Generally, using a while loop to find a substring might not be necessary since `.find()` gives you what you need directly. You might just use an if statement with `.find()`, and you wouldn't have to set up a boolean variable. Simplifying the logic could make your code cleaner!
You're on the right track! Just remember: a while loop will keep running as long as the condition is true. So `!false` evaluates to true, allowing your loop to function as intended. It seems you've got the basic idea, but keep practicing!
To clarify while loops: they run as long as the condition evaluates to true. So when you have `while (!x)`, if `x` is false, `!x` becomes true, and the loop continues. Once `x` is true, `!x` evaluates to false, and that's when the loop ends. It sounds like you got it right with your approach!
Exactly! It's all about controlling the flow with your conditions.
Yeah, that's correct! It flows nicely as long as you manage the boolean properly.