Calling Methods in C#

Method Calling:-

When the methods are declared with parameters, they should be called with parameters. The methods with parameters are called by passing the value using the following mechanism:

• Value
• Reference
• Output

Value: The parameters passed by value creates a separate copy in the memory. The following example shows the parameters passed by value:

void CalculateSum( int num1, int num2)

{

   //…

}

void Accept()

{

    int val1=10;

    int val2=2;

    CalculateSum(val1,val2);

}

Reference: The parameters passed by reference does not creates a separate copy of the variable in the memory. A reference parameter stores the memory address of the data member passed. The following example shows the parameters passed by reference:

void CalculateSum( ref int num1,ref int num2)

{

//…

}

void Accept()

{

int val1=10;

int val2=2;

CalculateSum( ref val1,ref val2);

}

Output: The output parameters are used to pass the value out of the method. The following example shows the parameters passed by reference:

void CalculateSum( ref int num1,ref int num2, out int result)

{

     result=num1+num2;

}

void Accept()

{

int val1=10;

int val2=2;

int recieveVal;

CalculateSum( ref val1,ref val2,out recieveVal);

}