simple basic atm machine using python

.py

widrawal=float(input())
balance=float(input())
while(balance!=0):
    if(widrawal>balance):
        print(balance)
        break
    if(widrawal%5==0 and widrawal<balance):
        balance=balance-(widrawal+0.50)
        print(round(balance,2))
        break
    if(widrawal%5!=0):
        print("incorrect traction amount")
        break
    break