Python if statement

Examples Python3

The following examples usingif ... elif ... else statement to determine the number is positive, negative or zero:

# -*- coding: UTF-8 -*-

# Filename : test.py
# author by : www.w3big.com

# 用户输入数字

num = float(input("输入一个数字: "))
if num > 0:
   print("正数")
elif num == 0:
   print("零")
else:
   print("负数")

Execute the above code output results:

$ python test.py 
输入一个数字: 3
正数

We can also use the embedded if statement to achieve:

# -*- coding: UTF-8 -*-

# Filename ：test.py
# author by : www.w3cschool.cc

# 内嵌 if 语句

num = float(input("输入一个数字: "))
if num >= 0:
   if num == 0:
       print("零")
   else:
       print("正数")
else:
   print("负数")

Execute the above code output results:

$ python test.py 
输入一个数字: 0
零

Examples Python3