// 10/2/2017
// return value
// A method should be able to give back an answer based on its
// calculations, e.g. sqrt, pow, abs, average

import java.util.Scanner;

/** This class illustrates returning a value from a method
  */
public class ReturnValues {
  /** main method calls two different methods  
    *  
    */
  public static void main(String[] args)   {
         double num1=5.1, num2=26.7;
     System.out.println("sum is " + calculateSum(num1, num2));
     double s;
     s=calculateSum(95.4, num1);
     System.out.println("In main, value of s is: " + s);
  }
  /** 
   * method calculateSum accepts 2 double values and adds them.
   * @param val   first value to be added.
   * @param val2  second value to be added.
   * @return returns the sum of the 2 numbers.
   */
  // data type of the value to return goes before name of method
  public static double calculateSum(double val, double val2)  {
    // sum is called a local variable
     double sum=val+val2;
     return sum;
  }  
} 
  /* up to here.
    * Show how to get rid of sum and return value of expression.
    * Lab next time will be on methods with return value and parameters
    */