# Program to implement a Quadratic equation in Java

- Link: https://technotaught.com/program-to-implement-a-quadratic-equation-in-java/
- Published: 2018-11-03T21:46:58+05:30
- Author: Ashishkumar Vishwakarma

In this program, you will learn to find all roots of a quadratic equation in Java.

Also, you can use the Java [compiler](https://www.onlinegdb.com/online_java_compiler)
to compile a program.

![Program to implement a Quadratic equation in Java](https://technotaught.com/wp-
content/uploads/2020/11/Quadratic-equation.png)

## Program to implement all Roots of a Quadratic equation in java

The standard form of equation is:

    ```wp-block-preformatted
    ax2 + bx + c = 0, where
    a, b and c are real numbers and
    a ≠ 0
    ```

The term `b^(2)-4ac` is known as the determinant of an equation. The determinant
tells the nature of the roots.

 * If the determinant is greater than 0, the roots are real and different.
 * And determinant is equal to 0, the roots are real and equal.
 * If the determinant is less than 0, the roots are complex and different.

##### SOURCE CODE.

    ```javascript
    import java.util.*;
    class quadratic3
    {
    	public static void main(String args[])
    	{
    		int e,a,b,c;
    		double l,x,y;
    		Scanner s= new Scanner(System.in);
    		System.out.println("Enter value a,b,c:");
    		a=s.nextInt();
    		b=s.nextInt();
    		c=s.nextInt();

    		e=b*b-4*a*c;
    		if(e<0)
    		{
    			System.out.println("NOT REAL");
    		}
    			else if(e == 0) 
    		{
                     x = -b / (2.0 * a);
                    System.out.println("The root is " + x);
    		}
    		else 
    		{
    			l=Math.sqrt(e);
    			x= (-b+l)/(2*a);
    			y= (-b-l)/(2*a);
    			System.out.println("equation= "+x+" & "+y);
    		}
    	}// END OF MAIN
    }//END OF CLASS	
    ```

#### OUTPUT.

> C:\A>javac quadratic3.java
> C:\A>java quadratic3Enter value a,b,c:144The root is-
> 2.0

#### OR

> C:\A>javac quadratic3.java
> C:\A>java quadratic3Enter value a,b,c:152equation= -
> 0.4384471871911697 & -4.561552812808831

Also view: – [Command-Line program find the Largest number](https://technotaught.com/command-line-program-find-the-largest-number/)

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## Comments

### By: Cecil Porter

- Link: https://technotaught.com/program-to-implement-a-quadratic-equation-in-java/#comment-126
- Published: 2020-04-22T02:24:20+05:30

Thanks for the info 🙂

### By: Add URL

- Link: https://technotaught.com/program-to-implement-a-quadratic-equation-in-java/#comment-122
- Published: 2020-04-19T01:20:22+05:30

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### By: Jonathon Earl

- Link: https://technotaught.com/program-to-implement-a-quadratic-equation-in-java/#comment-116
- Published: 2020-04-16T22:40:05+05:30

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