Parameters or arguments in java

 Parameters:

• It provides data communication between the calling function and the called function.
• There are two types of parameters,

    (i). Actual parameters:

• Used in data transferred from the main function to the user-defined function.

    (ii). Formal parameters:

• Used in data transferred from a user-defined function into main function.

Local and global variables:

Local variable:

• The local variables are defined within the body of the function.
• This variable used within the function only, other functions can not access these variables.

Example:

int a=10,b=5;

if(a>b)

{

          int c=a+b;

}

else

{

        int c=a-b;

}

Global variable:

• The global variables are defined outside the function or conditions ,these variables are only used in this particular part.

Example:

int x=5,y=10;

int z;

if(x<y)

{

         z=x+y;

}

else

{

         z=x-y;

}

Example program for local and global variables.

public class Parameters {

    int p=10,q=10;//Global variable

    int add(int x,int y)//Formal argument

    {

        return x+y;

    }

    void sub()

    {

        int r=p-q;//Local variable is r

        System.out.println("Subtraction value: "+r);

    }

    void mul()

    {

        int r=p*q;//Local variable is r

        System.out.println("Multiplications value: "+r);

    }

    public static void main (String args[])

    {

        int a=10,b=5;

        Parameters p=new Parameters();

        System.out.print("Result of a add b value is : " +p.add(a, b)+"\n");//Actual 

                                                                                                                 argument

        p.sub();

        p.mul();

       

    }

 

}

Output:

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