Python while loop does not terminate after exceeding range (0, 10), but for loops do. Why is that?

Question

If I use a while loop for my below code, it is not giving the desired output, but when i use for loop i am anle to get the output. a = [1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89] b = [1, 1, 2, 3, 5, 6, 7, 8, 9, 10, 11, 12, 13] x = 0 Comm = [] #common int in both lists while x in range(0,len(a)): if a[x] in b: Comm.append(a[x]) x += 1 print(Comm) Select the correct answer from above options

Answer 1

You need to use the for loop instead of while. If x goes from the 0 to 6, then a[6] = 13. a[6] is in b, so x becomes 7 and a[7] = 21. a[7] is not in b, so x doesn't increase. It means that x stops at 7 and doesn't break out of the while loop. Do check out Data Science with Python course which helps you understand from scratch