What’s wrong with the following code snippet?count = 0while count < 3:print(count)count -= 1
Question
What’s wrong with the following code snippet?
count = 0
while count < 3:
print(count)
count -= 1
Solution
The problem with the code snippet is that it creates an infinite loop. Here's why:
- The variable
countis initially set to 0. - The
whileloop condition checks ifcountis less than 3. Sincecountis 0, the condition is true, so the loop starts. - Inside the loop, the
print(count)statement prints the current value ofcount, which is 0. - The
count -= 1statement decreases the value ofcountby 1, makingcountequal to -1. - The loop then goes back to the condition check. Since -1 is less than 3, the condition is still true, so the loop runs again.
- This process repeats indefinitely because
countwill always be less than 3. Thecount -= 1statement only makescountsmaller, never larger.
To fix this, you could change the count -= 1 statement to count += 1, which would increase count by 1 each time the loop runs. This way, count will eventually be equal to 3, the loop condition will be false, and the loop will stop.
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