变量的交换

变量的交换

解释
a = "hello"
b = "world"
交换a和b的值
预期结果：a = "world" b = "hello"

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方式一：python特性a,b交换

a = "hello"
b = "world"
a,b = b,a
print("交换后的a：%s" %a)
print("交换后的a：%s" %b)

方式二，使用第三个变量交换

a = "hello"
b = "world"

c = a
a = b
b = c
print("交换后的a",a)
print("交换后的b",b)