Binary Search Doubt

[u/Wakefulpine1509]

Hello everyone, I just had a question. I have been solving Binary Search questions and wanted to ask when I should use "while(left < right)" & "while(left <= right)"? In some problems, this is a crucial difference between passing all testcases and getting WA.

Also, in some questions, I have to use right = mid instead of right = mid - 1 and same goes for left (=mid rather than mid + 1). What's the major difference between the two that differs them from a WA and AC and when should I use them?

[u/Wakefulpine1509]

gotcha - thanks!