while loops within while loops

Question

im writing my own hangman game and im having issues with this part
while x != 6:
hang = input("choose a letter : ")
print("")
while (len(hang)) > 1:
print("one letter at a time hero")
hang = input("choose a letter : ")
while hang in used:
hang = input("letter already used try again : ")
print("")
while (len(hang)) == 0:
hang = input("you must guess a letter hero : ")
print("")
while hang.isdigit():
hang = input("your guessing words not numbers hero guess a letter : ")
the issue is that if one of these catches an error it will work however if it say you enter a number and then enter two letters the double letters will go through how can i change the code to fix this

Answer 1

I'll try the if / elif statements and see if that works and post the results

Answer 2

the if elif statements worked thank you