在 python 中遇到 sqrt() 问题，我正在使用 Visual Studio Code 软件进行 python 练习

Question

Why does my terminal show (8+0j) instead of 8.0 after input print(sqrt(64)) ? Is it my setting fault?

https://i.stack.imgur.com/Z6bCD.png

Answer 1

I suppose you are using cmath ? the sqrt function in cmath returns a complex number instead of a float You should import sqrt from math instead of cmath it return a float

from math import sqrt
print(sqrt(x))

Answer 2

I think this is true

Try:

print(int(sqrt(49)))

Answer 3

pip install python-math <- install the math module if you haven't install it.

import the math module

import math

print(math.sqrt(4)) <- out put 2.0