如何仅打印for循环中的最后一个值? [英] How do I print only the last value in a for loop?

问题描述

对于下面的代码，我只想打印平方根函数的最后一个近似值，而不是打印出所有近似值.

For the below code, I only want to print the last approximation for the squareroot function, instead of printing out every approximation.

def square(x):
    guess = int(x/2)
    for i in range(1,10):
        nextguess = (guess + x/guess)/2
        guess=nextguess
        print(nextguess)

推荐答案

只需取消您的print()标识即可:

Just de-denting your print() will work:

def square(x):
    guess = int(x/2)
    for i in range(1,10):
        nextguess = (guess + x/guess)/2
        guess=nextguess
    print(nextguess)

循环后，nextguess仍然具有最后一个循环的值. 在Python中，循环不会创建新的作用域.因此，您在循环中创建或更改的所有内容在循环之后仍然可用.

After the loop, nextguess still has the value form the last cycle. In Python, a loop does not create a new scope. So, everything you create or change in the loop is still available after the loop.

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