vorname = "Heinz"
nachname = "Meier"
name = vorname + " " + nachname
print(name)

print()
s = "Musik"
t = "lautsprecher"
s += t
print(s)

# immutable vs. mutable
print()
s = "Musik"
t = "lautsprecher"
temp = s
s += t
print(s)    # "Musiklautsprecher"
print(t)    # "lautsprecher"
print(temp) # "Musik"
print()
s = [1, 2]
t = [3, 4]
temp = s
s += t
print(s)    # [1, 2, 3, 4]
print(t)    # [3, 4]
print(temp) # [1, 2, 3, 4]