Java Program To Find Roots of a Quadratic Equation

Learn How To Find Roots of a Quadratic Equation in Java Programming Language. This Java Program To Compute Roots of Quadratic Equation makes use of If – Else Block.

What is a Quadratic Equation?

It is a term used in Elementary Algebra. The Standard Form of a Quadratic Equation is ax² + bx + c = 0, where a, b, c are constant values which cannot be changed and x is a variable entity.

Quadratic Equation Formula

h = −b ± √(b²− 4ac) / 2a

Conditions For Discriminants

If b²− 4ac = 0, One Real Solution is possible
If b²− 4ac is Positive, Two Real Solutions are possible
If b²− 4ac is Negative, Two Complex Solutions are possible

The java.lang.* package consists of Math.sqrt() method which helps to calculate the Square Root of the Discriminant.

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Java Program To Find Roots of a Quadratic Equation

import java.io.*;

import java.util.*;

import java.lang.*;

class quadratic_equation

{

public static void main(String args[])

{

double x, y, z;

double root1, root2;

double discriminant, sqr;

System.out.println("\nEnter The Values");

Scanner sc = new Scanner(System.in);

System.out.println("\nX:\t");

x = sc.nextFloat();

System.out.println("\nY:\t");

y = sc.nextFloat();

System.out.println("\nZ:\t");

z = sc.nextFloat();

discriminant = y*y - 4*x*z;

sqr = Math.sqrt(discriminant);

if(discriminant<0)

{

System.out.println("\nRoots Are Imaginary\n");

}

else

{

root1 = (-y + sqr) / (2*x);

root2 = (-y - sqr) / (2*x);

System.out.println("\nRoot 1 = " + root1 + "\n");

System.out.println("\nRoot 2 = " + root2 + "\n");

}

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Output

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Find Roots of Quadratic Equation Java Program