Not working

[gusty raven]

So I have this code. And the 2nd part isnt working where I am trying to have the rectangle area be a method. It prints like I want it to apart from the 2nd part. I feel like im doing something obvouis that is wrong but I have no idea.

[south patrol]

<@&987246399047479336> please have a look, thanks.

[south patrol]

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It seems like you have encountered an issue with your code. To better understand the problem and provide a solution, could you please provide the code you are referring to?

[gusty raven]

I just want to return the area but its not printing

[bitter sandal]

@gusty raven could you provide some context about the problem? im confused with second half of your program.

about this bit

[gusty raven]

Alright

So thats all fine that part is just me giving a length and the user inputting the width which prints the area. Then another area but adding 3 to the legth and printing it 4 times. And also saying its small if its under 20 and big if its over 20t

This all works perfectly fine

Now I made a method to get the area I just want the area printed

so 5 X 5

But nothing else prints

Can I put a method in the first method

Or Im just not sure

[bitter sandal]

method is fine, but since you assigned length and width as 5, it will always print 25

[gusty raven]

/**
 * Programming with methods
 */
public class MyProgram
{
    public void runMyProgram()
    { 
        double length1;
        length1 = 6.5;
        double width1;
        double area1;
        
        System.out.println("Pick a width");
        
        Scanner input = new Scanner(System.in);
        width1 = input.nextDouble();
        
        System.out.println("The area of the rectangle = " + length1 * width1);
        
        int length2 = 0;
        
        int width2;
        width2 = 5;
        int counter = 0;
        
        
        
        while(counter < 4) {
            
            length2 += 3;
            int area = length2 * width2; 
            
            System.out.println("The area of the rectangle = " + area);
            
            if (area >= 20){
                System.out.println("Large Rectangle");
            }else{
                System.out.println("Small Rectangle");
                
            }
            
            counter++;
            
            }
            
            
            
    
        
        
            
        }
        
        //part 2
        //method RectangleArea
            
    
        
        public void rectangleArea (int length, int width)
    {
                length = 5;
                width = 5;
                
                int area = width * length;
                System.out.println("The area of the rectangle = " + area);
                
                
                
                
            
                
            
            
            
    }
        
    
        
    
        
      

    //Define as many subordinate methods as you like
    
    
    public static void main(String[] args)

    { 
        MyProgram prog = new MyProgram();  //create an object
        prog.runMyProgram();  //invoke the top method

    }

    
    
}```

[south patrol]

Detected code, here are some useful tools:

Formatted code

import java.util.Scanner;

/**
 * Programming with methods
 */
public class MyProgram {
  public void runMyProgram() {
    double length1;
    length1 = 6.5;
    double width1;
    double area1;
    System.out.println("Pick a width");
    Scanner input = new Scanner(System.in);
    width1 = input.nextDouble();
    System.out.println("The area of the rectangle = " + length1 * width1);
    int length2 = 0;
    int width2;
    width2 = 5;
    int counter = 0;
    while (counter < 4) {
      length2 += 3;
      int area = length2 * width2;
      System.out.println("The area of the rectangle = " + area);
      if (area >= 20) {
        System.out.println("Large Rectangle");
      }
      else {
        System.out.println("Small Rectangle");
      }
      counter++;
    }
  }
  //part 2
  //method RectangleArea
  public void rectangleArea(int length, int width) {
    length = 5;
    width = 5;
    int area = width * length;
    System.out.println("The area of the rectangle = " + area);
  }
  //Define as many subordinate methods as you like
  public static void main(String[] args) {
    MyProgram prog = new MyProgram();
    //create an object
    prog.runMyProgram();
    //invoke the top method
  }
}

[blissful grove]

u can call methods in other methods, just not define them

[gusty raven]

How?

[gusty raven]

Yeah but nothing else prints

[bitter sandal]

are you calling the method somewhere?

[gusty raven]

As of now I am just trying to get the area

So length X Width just something simple

[blissful grove]

not what alpha is asking

are u using that method that u made somewhere ?

[gusty raven]

no

[blissful grove]

u made a method, but if u do not call ( use ) it, its just wasted code lines

[gusty raven]

I thought doing the print would just print it

Because thats how it worked on the other method

This is why I am confused im not sure how to call it on this one

[blissful grove]

look at your main

there your calling the runMyProgram method

[gusty raven]

Ahhh

[blissful grove]

hence the code in that method gets executed

[gusty raven]

I see

Sorry this is practice code so it was already made that main

It was a template

[bitter sandal]

no worries, your main method is responsible for calling stuff

public static void main(String[] args) {
    MyProgram prog = new MyProgram();
    //create an object
    prog.runMyProgram();
    //invoke the top method
  }```

[gusty raven]

Oh so doing the prog.runmyprogram is invoking it

Cause it said to do that after

[bitter sandal]

same way you'd call rectangleArea(val1,val2)

[bitter sandal]

yes, if you define your rectangleArea inside MyProgram then you'd have to do use object of class to call that method

prog.rectangleArea(val1,val2)

idk if you are familiar with objects and classes, if not then no need to worry too much

I assume your goal was to create a method which can generate area for you instead of doing it inside your program?

[gusty raven]

Yeah that was my gaol

goal*

In a suitable part of MyProgram, define a method called rectangleArea that calculates the area of a
rectangle. The method has two parameters which represent the length and width of a rectangle (and
can be real numbers e.g. 4.5) and returns the area. Formula for the area of a rectangle is length *
width

See it told me to do it in my program

[bitter sandal]

you got the method right except you defined values as 5, which is incorrect. Apart from that, to use the method anywhere you just rectangleArea(value1,value2)

[gusty raven]

How come its incorrect?

Putting it as 5?

[bitter sandal]

it will always assume length and width as 5, 5

but we wanna use it for different values of L,W

so if you don't define then L,W will be used from passed in values aka arguements

[bitter sandal]

it doesn have to be value1 and value2, i meant to say whatever you define in your definition for ex L,W. You pass values in that order.

[blissful grove]

also, your not doing it correct

[bitter sandal]

So you should pass different values of L,W

[gusty raven]

Idk why im actually so confused with this

[gusty raven]

So I shoudl write the number?

Like value1 should be 5 or whatever?

[bitter sandal]

you should pass whatever variable holds the value of L,W

Ok let me give you an example

Let's say i have a method called printNumber(int val){ //print val}

this is how i defined my method, where val is the paramater

which means it's a placeholder for whatever value you pass when you actually call the method

so i can do printNumber(1)-->prints 1

printNumber(2)-->prints 2

and so on

you're gonna have to let me know if this makes sense

[gusty raven]

public void rectangleArea (int length, int width) So Length and Width is the parameter

[bitter sandal]

yes

you can pass any value of length and width and it will print area for you based on that

when you call teh method

[gusty raven]

Yeah so I didnt need to do length = 5

And width = 5

[bitter sandal]

correct, that means hey doesnt matter what i pass as arguements. Make length and width equal to 5 and mulitply that only.

[gusty raven]

    {
                int area = width * length;
                System.out.println("The area of the rectangle = " + area);```

So i dont need a value anywhere?

[bitter sandal]

not in the method definition

[gusty raven]

So the method definition is just the public void part?

[bitter sandal]

when you call the method, it will pass those values in place of these placeholders

[bitter sandal]

from that to everything that's in {}

[gusty raven]

Ok so its all goodH

How do I call it now?

[bitter sandal]

you can just use the name of method and pass the values that you wanna calculate area of

[gusty raven]

Where do I do it?

In the top method?

[bitter sandal]

where do you need it?

the part where you want to print the area

[gusty raven]

Invoke it in run my program

Thats the first method

[bitter sandal]

yes you can

[gusty raven]

prog.runMyProgram(); //invoke the top method

Would I do this but call it rectangleArea?

[bitter sandal]

nope, not if you need it inside your runMyProgram

[gusty raven]

So how do I invoke in it?

[bitter sandal]

lets take a step back

what does this method do? rectArea method

[gusty raven]

Gives a length and width

Which I need to multpy

mutiply*

To get the area

[bitter sandal]

incorrect, it calculates the area based on passed values.

[gusty raven]

Oh

[bitter sandal]

also prints it

now where in your code you are doing this same thing but without any method

[gusty raven]

In myprogram

the main method#

[bitter sandal]

can you print the area using this method instead of those lines of code, look for lines that you can replace with this new method.

[gusty raven]

I could but Im now meant to leave it

Like all the things I done above

Needs to be kept the same#

Apparently

[bitter sandal]

ah

so i don't see a reason for this new method

unless im missing something

[gusty raven]

Yeah Im not sure pretty much this is a sample test for us to practice

Like its not a real one its just cause we have a real one next week

This is legit what it asked I assume part 1 is completly fine

Part 2 is where Ive started to actually struggle

[bitter sandal]

ah oki then you can call any method inside your main method

[gusty raven]

Call any method

So I dont need to do all of this?

[bitter sandal]

wait nvm let me read it

oki they want you to use this method inside runMyProgram to calculate and print area

[gusty raven]

So I needed to do what I did so far?#

[bitter sandal]

this is fine, it's defintion of your method

you need to call it where you want to calculate the area

lets look at this, can you see where you should call the method?

[gusty raven]

Where the print is?

[bitter sandal]

do you understand why tho?

[gusty raven]

Because calling the method is printing it? Like we want the call the method which is already made which will give us the area?

[bitter sandal]

correct

we made a method to calculate and print area, and that's why we can use it anywhere we want to calculate the area.

[gusty raven]

Yeah

[bitter sandal]

Now i assume you know where else you need to call this method

[gusty raven]

Either down the botton or in the method we made

[bitter sandal]

ye it does say return

[bitter sandal]

anywhere if you need to calculate and print area, rectArea is your guy.

You might wanna look into "return" or "print", these are different things. I believe your question talked about return the area.

[errant ibex]

u specified ur method return type to be void

that's incorrect if u want to return something

to return area, it must be int

[gusty raven]

Nice thank you

Would that be correct as it prints the area now

[bitter sandal]

yes, seems alright to me. Your method calculates and returns the area and you are just printing it here.

Methods are cool, you can make all sorts of methods which can do some stuff and then you just call em. Lots of benefits but you will learn with time.

[gusty raven]

Yeah hopefully I can get better at them lol

Thank you very much for the help

One last question is there any need for this

When I have this

Or do I need them both?

[bitter sandal]

First one is your method definition, without definition it won't know what rectangleArea is

You define things first only then you get to use em. So to answer your question yes you need both parts.

[gusty raven]

Thank you

[south patrol]

Closed the thread due to inactivity.

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