Answer to Question #125733 in Java | JSP | JSF for seth dacha

Question

Discuss the concept of parameters. What are parameters for? What is the difference between formal parameters and actual parameters? Give an example in Java code that illustrates formal parameters and actual parameters.

Answer 1

/*
  Parameters are used to pass data to the method.
  This allows to call same method with different values of data.

  Actual parameters - variables or values passed to the method while calling.

  Formal parameters - variables declared in method signature (between parentheses).
*/


class Main {
  public static void main(String[] args) {
    int v = 1;

    // here, variable 'v' and value '2' are Actual parameters
    int result = sum(v, 2);

    System.out.println(result);
  }

  public static int sum(int a, int b) {
    // here, variables 'a' and 'b' are Formal parameters
    return a + b;
  }
}