Python Expressions

Question

s = "bananab"
while s[0] == s[-1]:
mid = len(s)//2
s = s[1:mid] + s[0] + s[mid:-1]
print (s)

WHY is output "bnaa" instead of "anbana"?
I tried to print (s[1:mid]) , (s[0]) and (s[mid:-1]) seperately and it supports my theory that anbana should be the output.

Thank you for your time.

Answer 1

If your condition is s[0] == s[-1] then it will continue for

(Capitals are used to show equality)

BananaB --> condition met

AnbanA --> condition met

NbaaN --> condition met

Bnaa --> Here the loop will break as s[0] != [-1] so it is the output!

Answer 2

I'll keep this really short. Just add a print(s) statement inside the while loop and you'll know.