PROGRAMMING:4-1 judge whether n is odd or even

4-1 input a positive integer n to judge whether n is odd or even
###Input format:
For example, enter an integer on a line.
###Output format:
For example: output n is odd / even
###Input example:
Here is a set of inputs. For example:
```in
two
```
###Output example:
The corresponding output is given here. For example:
```out
2 is even.
```







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