我们知道python提供了一个shell来供初学者学习,在shell里是输入一句执行一句,例如:

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" alt="" />

我们可以看到,在shell里会将结果自动输出到屏幕,不需要使用print()函数

而在使用编辑器编写python程序时,必须要使用print()函数,才能将结果输出到屏幕上

print(abs(-))

才会将数据输出到屏幕上,这两种情况需要区分清楚。

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