Python习题册021：判断奇偶数

任务021描述

用Python编写一个程序，判断输入的数字是奇数还是偶数，并相应的输出信息。

分析及示例

要判断一个数为奇数还是偶数，依据的是它被2除后的余数。因此可以用“%”运算符来计算并判断。

示例代码：

def judgeOdd(num):
    if num %2 >0:
        return '%i is an odd number.'%num
    else:
        return '%i is an even number.'%num
for i in range(-3,11):
    print(judgeOdd(i)) 

运行结果：

-3 is an odd number.
-2 is an even number.
-1 is an odd number.
0 is an even number.
1 is an odd number.
2 is an even number.
3 is an odd number.
4 is an even number.
5 is an odd number.
6 is an even number.
7 is an odd number.
8 is an even number.
9 is an odd number.
10 is an even number.