//TASK 1.1
    private void callerSideEffect() {

        myWindow.clearOut();

        //actual parameters
        int[] arrayActual = {1, 8, 16, 4, 20};                                    //array of int as reference type
        int intActual = arrayActual[0];                                           //element of array as value type

        calledSideEffect(arrayActual, intActual);


        myWindow.writeOutLine("\nAFTER METHOD CALL:");
        myWindow.writeOutLine("The value of intActual after method call is: " + intActual + "\nThe value of arrayActual after method call is: " + arrayActual[0]);
    }
    private void calledSideEffect(int[] arrayFormal, int intFormal) {           //formal parameters

        arrayFormal[0]++;                                                       //1 incremented by 1
        //above arrayFormal equals to the arrayActual (references to the same address, so the address after call is not changed)
        intFormal++;                                                            //also incremented by 1

        myWindow.writeOutLine("ON METHOD CALL:");
        myWindow.writeOutLine("The value of arrayFormal on method call is: " + arrayFormal[0] + "\nThe value of intFormal on method call is: " + intFormal );
    }

    //TASK 1.3
    private void callerSwapParameters() {
        myWindow.clearOut();

        //actual parameters
        int n1 = 8;
        int n2 = 12;

        calledSwapParameters(n1, n2);

        myWindow.writeOutLine("\nAFTER METHOD CALL:");
        myWindow.writeOut("The value of n1 after the call is: " + n1 + "\nThe value of n2 after the call is: " + n2);
        //this methods values will be different to the calledSwapParameters values

    }
    private void calledSwapParameters(int n2, int n1) {

        myWindow.writeOutLine("ON METHOD CALL:");
        myWindow.writeOutLine("The value of n1 on the method call is: " + n1 + "\nThe value of n2 on the method call is: " + n2);
        //ESSENTIALLY, SWAPPED ON METHOD CALL
    }