Print the longest str from user input

[edwdas]

Essentially, the user inputs random strings and i am trying to reprint the longest string that the user input (so far it only prints the first non-capital letter). A bit lost on how to fix this.

loopEnd = ""

n = (input("Input: "))
longString = max(n)

while n != loopEnd:
    n = str(input("Input: "))
    if n == loopEnd:
        print("Longest input was", "'",longString,"'")