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Java Program to Find Roots of Quadratic Equation

import java.util.*; class testing {         public static void main(String args[])         {             double d,a,b,c,r1,r2;             Scanner sc=new Scanner(System.in);             System.out.println("Enter a:");             a=sc.nextDouble();             System.out.println("Enter b:");             b=sc.nextDouble();             System.out.println("Enter c:");             c=sc.nextDouble();             d=(Math.pow(b,2))-4*a*c;             if(d>0)             {                 r1=(-b+Math.sqrt(d))/(2*a);                 r2=(-b-Math.sqrt(d))/(2*a);                 System.out.println("1st root="+r1);                 System.out.println("2nd root="+r2);             }             else if(d==0)             {                 r1=-b/(2*a);                 System.out.println("1st root="+r1);             }             else             {                 System.out.println("Imaginary Roots");
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Write a Program To Input the Marks and Display the Grades Accordingly using if-else in Java

import java.util.*; class Marks {     public static void main(String args[])     {         int m;         Scanner sc=new Scanner(System.in);         System.out.println("Enter the Marks:");         m=sc.nextInt();         if(m>=80)         {             System.out.println("Distinction");         }         else if(m>=60 && m<80)         {             System.out.println("First Division");         }         else if(m>=45 && m<60)         {             System.out.println("Second Division");         }         else if(m>=40 && m<45)         {             System.out.println("Pass");         }         else         {             System.out.println("Promotion Not Granted");         }     } }         OUTPUT: Enter the Marks: 90 Distinction YouTube Videos for Explanation https://www.youtube.com/watch?v=aqNaKEncMVE
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WAP to input the total cost and to compute and display the Amount to be paid after the discount on the cost of purchased items, based on the following criteria:

WAP to input the total cost and to compute and display the Amount to be paid after the  discount on the cost of purchased items, based on the following criteria:         Cost                                            Discount (in percentage) Less than or equal to Rs. 10000                               5% More than Rs. 10000 and less than or equal to Rs. 20000       10% More than Rs. 20000 and less than or equal to Rs. 35000       15% More than Rs. 35000                                           20%*//*WAP to input the total cost and to compute and display the Amount to be paid after the  discount on the cost of purchased items, based on the following criteria:         Cost                                            Discount (in percentage) Less than or equal to Rs. 10000                               5% More than Rs. 10000 and less than or equal to Rs. 20000       10% More than Rs. 20000 and less than or equal to Rs. 35000       15% More than Rs. 35000         
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Marquee Tag in Html and Properties of Marquee Tag with Html Code

<!DOCTYPE html> <html> <head> <title>Marquee Tag Example</title> </head> <body> <marquee behavior="scroll" scrollamount="10" direction="right" loop="3">Welcome To Coding Hub</marquee> </body> </html>
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LIST Tags in Html

<!DOCTYPE html> <html> <head> <title>Example of List</title> </head> <body> <center><h1>Type of List</h1></center> <!--Order list--> <ol type=a> <li>Ajit</li> <li>Sahbaj</li> <li>Pawan</li> </ol> <ol type=A> <li>Ajit</li> <li>Sahbaj</li> <li>Pawan</li> </ol> <ol type=i> <li>Ajit</li> <li>Sahbaj</li> <li>Pawan</li> </ol> <ol start="10"> <li>Ajit</li> <li>Sahbaj</li> <li>Pawan</li> </ol>   <!--Unorder List--> <ul type="square">     <li>Ajit</li> <li>Sahbaj</li> <li>Pawan</li> </ul> <!--Defination List--> <dl> <dt>Ajit</dt> <dd>he is game De
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A Computer Salesman gets commission on the following basis using Java

/*A computer salesman gets commission on the following basis:             Sales                        Commission Rate             Rs. 0 - 20,000                      3%             Rs. 20,000 - 50,000                12%             Rs. 50,001 and more                31% After accepting the sales as input, calculate and print his commission amount and rate of commission.*/ Source code: import java.util.*; class Comm {     public static void main(String args[])     {         double comm=0.0;         int rate=0,sale;         Scanner sc=new Scanner(System.in);         System.out.println("Enter the sales rs:");         sale=sc.nextInt();         if(sale<=20000)         {             rate=3;             comm=sale*0.3;         }         if(sale>=20000 && sale<=50000)         {             rate=12;             comm=sale*0.12;         }         if(sale>=50000)         {             rate=31;             comm=sale*0.31;         }  
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Electricity Bill Program:Write a program in JAVA to enter the unit and calculate the amount to bill paid by user

Calculate the Bill as per the following tariff : Number of units Rate per unit 1 - 100 units Rs.5.00 101-200 units Rs.7.00 201-300 units Rs.10.00 Above 300 Rs:15.00 Before we write a program to calculate the electricity bill we must understand electricity charges and rates. /*1 - 100 unit - 5/= 101-200 unit - 7/= 201-300 unit - 10/= above 300 - 15/=*/ Explanation if the unit consumed less or equal to 100 units, calculates the total amount of usage =unit*5 if unit consumed between 100 to 200 units, calculates the total amount of usage =(100*5)+(unit-100)*7) if unit consumed between 200 to 300 units ,calculates total amount of usage =(100*5)+(100*7)+(unit-200)*10 if unit consumed above 300 units ,calculates total amount of usage =(100*5)+(100*7)+(100*10)+(unit-300)*15 No additional charge Source code import java.util
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Wap to enter a number and Decide whether the number is Buzz number or Not using Java

This program checks if a number entered is a Buzz Number or not in JAVA. A number is said to be Buzz Number if it ends with 7 or is divisible by 7. Example- 21,67,77 import java.util.*; public class Buzz {     public static void main(String args[])     {         Scanner sc=new Scanner(System.in);         System.out.println("Enter the number to be checked.");         int num=sc.nextInt();         if(num%10==7 || num%7==0)         {             System.out.println(num+" is a Buzz Number.");         }         else         {             System.out.println(num+" is not a Buzz Number.");         }     } } Enter the number to be checked. 77 77 is a Buzz Number.
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Wap to enter the length and breadth of a rectangle and print area and perimenter

import java.util.*; class Rectangle {         public static void main(String args[])         {             int l,b,ar,p; // local variable             Scanner sc=new Scanner(System.in);             System.out.println("Enter length and breadth");             l=sc.nextInt();             b=sc.nextInt();             ar=l*b;             p=2*(l+b);             System.out.println("Area="+ar);             System.out.println("perimeter="+p);         }     }                 Enter length and breadth 10 20 Area=200 perimeter=60
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Wap to enter the side of and print area and perimenter in Java

import java.util.*; class side {     public static void main(String args[])     {         int s,ar,pm; //variable         Scanner sc=new Scanner(System.in);         System.out.println("Enter the side");         s=sc.nextInt();         ar=s*s;         pm=4*s;         System.out.println("Area="+ar);         System.out.println("Perimenter="+pm);     } } Output: Enter the side 10 Area=100 Perimenter=40
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Design a class name ShowRoom with the following description: Instance variables/data members: String name: to store the name of the customer. long mobno: to store customer’s mobile number. double cost: to store the cost of the item purchased. double dis: to store the discount amount. double amount: to store the amount to be paid after discount. Methods: ShowRoom(): default constructor to initialize the data members void input(): to input customer name, mobile number, cost void calculate(): to calculate discount on the cost of purchased items, based on the following criteria Cost Discount(In percentage) Less than or equal to ₹ 10000 5 % More than ₹ 10000 and less than or equal to ₹ 20000 10 % More than ₹ 20000 and less than or equal to ₹ 35000 15 % More than ₹ 35000 20% void display()- To display customer, mobile number, amount to be paid after discount. Write a main() method to create an object of the class and call the above methods.

import java . util . Scanner ; class ShowRoom { String name ; long mobno ; double cost , dis , amount ; ShowRoom ( ) //default constructor { name = "" ; mobno = 0L ; cost = 0.0d ; dis = 0.0d ; amount = 0.0d ; } void input ( ) { Scanner kb = new Scanner ( System . in ) ; System . out . print ( "Enter your name: " ) ; name = kb . nextLine ( ) ; System . out . print ( "Enter your Mobile Number: " ) ; mobno = kb . nextLong ( ) ; System . out . print ( "Enter cost of item purchased: " ) ; cost = kb . nextDouble ( ) ; } void calculate ( ) { if ( cost <= 10000 ) { dis = cost * 5 / 100 ; amount = cost - dis ; } else if ( cost > 10000 && cost <= 20000 ) { dis = cost * 10 / 100 ; amount = cost - dis ; } else if ( cost > 20000 && cost <= 35000 ) { dis = c
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