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Python學習 - 面試題:交換兩個數字

# coding: utf-8

# 面試題:交換兩個數字
a = 6
b = 100

# solution 1
# c = a
# a = b
# b = c


# solution 2

# a = a + b
# b = a - b
# a = a - b


# solution 3

a, b = b, a

print a, b