How do I display the equation?

Question

import java.text.DecimalFormat;
import java.util.*;

public class Practice {
    static Scanner console = new Scanner(System.in);

    public static void main(String[] args) {
        DecimalFormat df = new DecimalFormat("#,###,##0.0000"); 
        float myfloat1 =0;
        float myfloat2 =0;
        float myfloat3 =0;
        float myfloat4 =0;
        float result =0; 
        result = (myfloat1 * myfloat2)/(myfloat3 + myfloat4); 

        System.out.println("Please enter first multiplied number");
        myfloat1 = console.nextFloat();

        System.out.println("Please enter second multipled number");
        myfloat2 = console.nextFloat();

        System.out.println("Please enter first addition number");
        myfloat3 = console.nextFloat();

        System.out.println("Please enter second addition number");
        myfloat4 = console.nextFloat();

        System.out.println("Your end result is " + df.format(result));
    }
}

Please enter first multiplied number
1
Please enter second multipled number
1
Please enter first addition number
1
Please enter second addition number
1
Your end result is ?

I'm also getting a question mark at the end. The problem I currently have is not being able to display the equation and the numbers the user assigns. Such as (1*1)/(1+1) and show the result of it. With 4 decimal precision.

Answer 1

Try like this;

public static void main(String[] args) {

    DecimalFormat df = new DecimalFormat("#,###,##0.0000");

    float myfloat1 = 0;

    float myfloat2 = 0;

    float myfloat3 = 0;

    float myfloat4 = 0;

    float result = 0;



    System.out.println("Please enter first multiplied number");

    myfloat1 = console.nextFloat();

    System.out.println("Please enter second multipled number");

    myfloat2 = console.nextFloat();

    System.out.println("Please enter first addition number");

    myfloat3 = console.nextFloat();

    System.out.println("Please enter second addition number");

    myfloat4 = console.nextFloat();
    result = (myfloat1 * myfloat2) / (myfloat3 + myfloat4);

    System.out.println("Your end result is " + df.format(result));

}

Output is;

Please enter first multiplied number
1
Please enter second multipled number
1
Please enter first addition number
1
Please enter second addition number
1
Your end result is 0,5000

Answer 2

You did the calculation well before you had the floats from user.

You want to move around your statement that does calculation. So remove your statement like:

result = (myfloat1 * myfloat2) / (myfloat3 + myfloat4);

And move it to place where you have all the number from user and then print whatever you want like:

result = (myfloat1 * myfloat2) / (myfloat3 + myfloat4);
System.out.println("Your end result for (" + myfloat1 + "*" + myfloat2 + ") / (" + myfloat3 + "  + " + myfloat4 + ") is " + df.format(result));