ziffern = [1, 2, 3, 4, 5, 6, 7, 8, 9]
print(ziffern.index(3))
s = "Hallo Welt"
print(s.index("l"))

print()
folge = [0, 11, 222, 3333, 44444, 3333, 222, 11, 0]
print(folge.index(222))
print(folge.index(222, 3))
print(folge.index(222, -5))
s = "Hallo Welt"
print(s.index("l", 5, 100))

print()
s = [2.5, 2.6, 2.7, 2.8]
#print(s.index(2.5, 1))      # ValueError: 2.5 is not in list