**Introduction to Java ****max() Function**

The java max() function used to return the maximum of two numerical values. The java max() function is a built-in function in java, which is defined in Java.lang.math class, so to use the max() function in a program the Java.lang.math class must to be import. The max() function accepts two parameters of numerical data types and returns maximum among both numerical parameters; it can be overloaded for different parameters of data types like int, float, double and long. It does not throw any exception.

### Syntax of Java max()

Following is a syntax:

**Syntax :**

`data_Type max(data_Type x, data_Type y)`

The data_types can be int, float, double and long.

Below are the parameters of the max() function:

The x and y are two numerical parameters among which the maximum number is to be return.

**Return value: **The function’s return value is a max of two numbers, which is the same data_type as that of the parameters pass.

The max() function in java can be overloaded for different parameters of data types, so the following are the syntax of the max() function in java:

`public static int max(int x, int y);`

`public static float max(float x, float y) ;`

`public static long max( long x, long y );`

`public static double max(double x, double y);`

**Note:**If parameters are passed as a positive and a negative number, the function returned a positive result. If both parameters are passed as a negative number, then the function returned a lower magnitude result. If parameters are passed as same value, then the function returned the same result. If either of the parameters is passed as an NAN value, then the function returned NAN as a result.

### Examples to Implement Java max() Function

Below are the examples:

#### Example #1

we write the java code to understand the max() function more clearly with the following example where we use the max() function to find the maximum of the two integer number passed by the user, as below.

**Code:**

```
import java.lang.Math;
class Demo
{
public static void main( String[] arg )
{
// variable declaration
int x = 1024, y = 2034, result;
// calling max() built in function which is define in Math built in class
result = Math.max(x,y);
System.out.println("The maximum number among "+x+" and "+y+" is "+result+"." );
}
}
```

**Output:**

**Explanation:**

As in the above code, the x and y are two variables declare and initialize with 1024 and 2034 values respectively, later, the max() function is called with passing these variables as parameters (int max(int x, int y) overloaded)and hence the result of this function is 2034, which is the maximum number in 1024 and 2034.

#### Example #2

We write the java code to understand the max() function where we use the max() function to find the maximum of the two double number passed by the user, as below.

**Code:**

```
import java.lang.Math;
class Demo
{
public static void main( String[] arg )
{
// variable declaration
double x = 134.78, y = 56.89, result;
// calling max() built in function which is define in Math built in class
result = Math.max(x,y);
System.out.println("The maximum number among "+x+" and "+y+" is "+result+"." );
}
}
```

**Output:**

**Explanation:**

As in the above code, the x and y are two variables declare and initialize with 134.78 and 56.89 double values respectively, later, the max() function is called with passing these variables as parameters (double max(double x, double y) overloaded)and hence the result of this function is 134.78, which is the maximum number in 1024 and 2034.

#### Example #3

We write the java code to understand the max() function where we use max() function to find the maximum of the two integer numbers accepted by the user from the console.

**Code:**

```
import java.lang.Math;
import java.util.Scanner;
class Demo
{
public static void main( String[] arg )
{
// variable declaration
int x, y, result;
// accept two numbers of integer type from console
System.out.println( "Enter the Two Numeric value: ");
Scanner sc = new Scanner(System.in);
x = sc.nextInt();
y = sc.nextInt();
result = Math.max(x,y);
//Print the maximum number between x and y
System.out.println("The maximum number among "+x+" and "+y+" is "+result+"." );
}
}
```

**Output:**

As in the above code, the x and y are two variables that declare and accepted these variable values from the user through the scanner object. Later, the max() function is called with passing these variables as parameters, and hence the result of this function based on the user entered values like 10 and 20 is 20.

#### Example #4

We write the java code for max() function where we use the max() function to pass two negative values and find the maximum, as below.

**Code:**

```
import java.lang.Math;
import java.util.Scanner;
class Demo
{
public static void main( String[] arg )
{
// variable declaration
int x, y, result;
x = -10;
y = -20;
result = Math.max(x,y);
//Print the maximum number between x and y of lower magnitude
System.out.println("The maximum number among "+x+" and "+y+" is "+result+"." );
}
}
```

**Output:**

As in the above code, the x and y are two variables declare and initialize with negative values -10 and -20 values respectively, later, the max() function is called with passing these variables as parameters and hence the result of this function is -10, which lower magnitude.

#### Example #5

We write the java code for max() function where we use the max() function to pass positive and negative values and find the maximum, as below.

**Code:**

```
import java.lang.Math;
import java.util.Scanner;
class Demo
{
public static void main( String[] arg )
{
// variable declaration
int x, y, result;
x = 10;
y = -20;
result = Math.max(x,y);
//Print the maximum number between x and y
System.out.println("The maximum number among "+x+" and "+y+" is "+result+"." );
}
}
```

**Output :**

As in the above code, the x and y are two variables declare and initialize with values 10 and -20 values respectively, and the result of this function is 10.

### Conclusion

The java max() function which is a built-in function in Java.lang.math class is used to gets the maximum of two numerical values, as we have seen above with an example.

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