Added Quadratic Equations Program

Author: iamarav

Other-Java-Programs/QuadraticEquation.java

@@ -0,0 +1,78 @@
+package practice;
+
+import java.util.Scanner;
+
+public class QuadraticEquation {
+
+	public static void main(String[] args) {
+
+		System.out.println("Program to find real values for a Quadratic Equation.\n---");
+		
+		Scanner sm = new Scanner(System.in);
+		System.out.println("Enter the integer values of a, b and c as for equation = ax2 + bx+ c:");
+		int a,b,c;
+		
+		System.out.print("a: ");
+		a= sm.nextInt();
+		System.out.print("b: ");
+		b= sm.nextInt();
+		System.out.print("c: ");
+		c= sm.nextInt();
+		
+		sm.close();
+		
+		double d=discriminant(a,b,c);
+		
+		if (d>0) {
+			System.out.println("D > 0\n2 Real Solutions.");
+			//if discriminant is real;
+			findRealValues(a,b,c,d);
+		}
+		
+		else if (d==0) {
+			System.out.println("1 Real Solution.");
+			//if discriminant is real;
+			findRealValues(a,b,c,d);
+		}
+		
+		else if (d<0) {
+			System.out.println("D < 0\n2 Imaginary Solutions.");
+			System.out.println("Cannot perform calculation as there are no Real Solutions.");
+			end();
+		}
+		
+		else {
+			System.out.println("Unknown Error");
+			end();
+		}
+
+	}
+
+	private static double discriminant(int a, int b, int c) {
+		
+		double d = ((b*b)-(4*a*c));
+		System.out.println("D = "+d);
+		return d;
+	}
+	
+	private static void findRealValues(int a, int b, int c, double d) {
+			
+		String ss = "";
+		
+		double x1= (((-b)+(Math.sqrt(d)))/(2*a));
+		double x2= (((-b)-(Math.sqrt(d)))/(2*a));
+		
+		ss = ss + x1 + ", " +x2;
+		System.out.println("Answer: "+ ss);
+		
+		end();
+	}
+	
+
+	private static void end() {
+		System.out.println("---\nThe Program has ended.");
+		System.exit(0);
+	}
+
+
+}

README.md

@@ -38,6 +38,7 @@ ___
 | 4     | [Anagram Checker](/Other-Java-Programs/Anagram.java)         | A Program to check if the entered Strings are anagram or not. | if/else, for loops, Array, String Operations |
 | 5     | [Remove Word From String](/Other-Java-Programs/RemoveWordFromString.java) | A Program to remove specific word from String.               | if/else, String Operations                   |
 | 6     | [Finding Missing Number](/Other-Java-Programs/FindingMissingNumberInArray.java) | Given an array C of size N-1 and given that there are numbers from 1 to N with one element missing, the missing number is to be found. | Array Operations                             |
+| 7     | [Quadratic Equation](/Other-Java-Programs/QuadraticEquation.java) | A Program to find real values for a Quadratic Equation with discriminant value method. | Arithmetic Operations                        |
 
 ### List of Cryptography Algorithms: