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Converting a for loop to a while loop

I have this for a for loop which I made I was wondering how I would write so it would work with a while loop.

def scrollList(myList):negativeIndices=[]for i in range(0,len(myList)):if myList[i]<0:negativeIndices.append(i)return negativeIndices

So far I have this

def scrollList2(myList):negativeIndices=[]i= 0length= len(myList)while i != length:if myList[i]<0:negativeIndices.append(i)i=i+1return negativeIndices

Well, you are nearly there. It's like this:

def scrollList2(myList):negativeIndices=[]i= 0length= len(myList)while i != length:if myList[i]<0:negativeIndices.append(i)i=i+1return negativeIndices

The problem you had is that you must increment the loop index on each iteration. You were only incrementing when you found a negative value.

But it's better as a for loop and your for loop is over complicated. I'd write it like this:

def scrollList(myList):negativeIndices=[]for index, item in enumerate(myList):if item<0:negativeIndices.append(index)return negativeIndices