## DoOp
### Instructions
Create a file named `DoOp.java` .
Write a function `operate` that returns the result of the given arithmetic operation specified in the parameters. The arguments should be passed in the following order:
- The first argument is the left operand
- The second argument is the operation sign
- The third argument is the right operand
### Expected Functions
```java
public class DoOp {
public static String operate(String[] args) {
// your code here
}
}
```
### Usage
Here is a possible ExerciseRunner.java to test your function :
```java
public class ExerciseRunner {
public static void main(String[] args) {
System.out.println(DoOp.operate(new String[]{"1","+","2"}));
System.out.println(DoOp.operate(new String[]{"1","-","1"}));
System.out.println(DoOp.operate(new String[]{"1","%","0"}));
System.out.println(DoOp.operate(args));
}
}
```
and its output :
```shell
$ javac *.java -d build
$ java -cp build ExerciseRunner
3
0
Error
it depend on the input.
$
```
### Notions
[Command-Line Arguments ](https://docs.oracle.com/javase/tutorial/essential/environment/cmdLineArgs.html )
[Operators ](https://docs.oracle.com/javase/tutorial/java/nutsandbolts/operators.html )
[Conditional statement ](https://docs.oracle.com/javase/tutorial/java/nutsandbolts/if.html )
[String ](https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html )
[Array ](https://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html )
