问题分析：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，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。

代码如下：while True:

try:

num=int(input('输入一个整数：')) #判断输入是否为整数

except ValueError: #不是纯数字需要重新输入

print("输入的不是整数！")

continue

if num%2==0:

print('偶数')

else:

print('奇数')

brea

输出结果输入一个整数：81

奇数

或者定义一个函数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))

输出结果-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.