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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.
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