Maximum_a = None
Minimum_a = None
while True:
inp = input("Enter a number: ")
if inp == "done":
break
try:
num_a = float(inp)
print(num_a)
if Minimum_a == None:
num_a = Minimum_a
elif num_a < Minimum_a:
num_a = Minimum_a
if Maximum_a == None:
num_a = Maximum_a
elif num_a > Maximum_a:
num_a = Maximum_a
except:
print ("Invalid input")
continue
print ("Maximum is", Maximum_a)
print ("Minimum is", Minimum_a)