为什么我的函数返回数据类型无?:Python 数据类型无 [英] why does my function is returning data type None??: Python datatype None

问题描述

这是我打印绝对数的python代码.我的函数返回类型 None.我没有明白我做错了什么.请帮我.

This is my python code for printing an absolute number. My function is returning type None. I am not getting what I have done wrong. Please help me.

def n(num):
    if num<0:
        return (num*-1)

no = input("Enter a number: ")
print "Absolute Value is: "
print n(no)

推荐答案

def n(num):
    if num<0:
        return (num*-1)
    else:
        return num


no = input("Enter a number: ")
print "Absolute Value is: "
print n(no)

编写 else 语句将返回 num >= 0

writing an else statement will return num >= 0

谢谢:)

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