Practice Question Chapter 1 - - - - - In Java

 Question: write a java program to print three numbers in java .

Ans: 

package HelloWorld;

import java.util.Scanner;

public class LearningJava {

public static void main (String[] args) {

Scanner scan = new Scanner(System.in);

int a = scan.nextInt();

int b = scan.nextInt();

int c = scan.nextInt();

int sum = (a+b+c);

System.out.println(sum);

}

}

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Question:2 write a java program to calculate cgpa using marks of three Subjects out of 100.

Ans:

package HelloWorld;

import java.util.Scanner;

public class LearningJava {

public static void main (String[] args) {

//Question: write a java program to calculate

//cgpa using marks of three Subjects out of 100.

Scanner scan = new Scanner(System.in);

int math = scan.nextInt();

int hindi = scan.nextInt();

int english = scan.nextInt();

int totalMarks= 100;

double cgpa = (math+hindi+english)/(3.0*totalMarks);

System.out.print(cgpa);

}

}

Question: Write a java program which asks user to enter her/his name and greets them with "Hello <name> have a good day text" .

package HelloWorld;

import java.util.Scanner;

public class LearningJava {

public static void main (String[] args) {

////Question: Write a java program which asks user to

// enter her/his name and greets them with

// "Hello <name> have a good day text" .

Scanner scan = new Scanner(System.in);

System.out.print("Enter Your Name:");

String name = scan.nextLine();

System.out.println("Hello" + " " + name + " " + "have a good day");

}

}

Question: Write a java program to convert Kilometer to Miles.

package HelloWorld;

import java.util.Scanner;

public class LearningJava {

public static void main (String[] args) {

//Question:Write a java program to convert

//Kilometer to Miles.

Scanner scan = new Scanner(System.in);

System.out.print("Enter distance in kilometers: ");

double kiloMeter = scan.nextDouble();

double miles = kiloMeter*(0.621371);

System.out.print(miles);

}

}

Question: Write a java program to detect a number entered by user is integer or not ?
Ans: 

package HelloWorld;

import java.util.Scanner;

public class LearningJava {

public static void main (String[] args) {

//Question:Write a java program to detect a

// number entered by user is integer or not ?

Scanner scan = new Scanner(System.in);

System.out.print("Enter a Integer: ");

if(scan.hasNextInt()){

System.out.print("Integer");

}

else {

System.out.print("Enter a Valid integer");

}

}

}

Question: Write a Java program to convert Celsius to Fahrenheit. The formula is: F = (C × 9/5) + 32.

Ans: 

package HelloWorld;

import java.util.Scanner;

public class LearningJava {

public static void main (String[] args) {

Scanner scan = new Scanner(System.in);

System.out.print("Enter Celcius: ");

double celcius = scan.nextInt();

double Fahrenheit = 0;

Fahrenheit = (celcius*9/5)+32;

System.out.print(Fahrenheit);

}

}

Question: Write a java Program to print N Natural Number  

Ans 

package HelloWorld;

import java.util.Scanner; //this is a class for take input from console and user

public class LearningJava {

// write a java program to print N natural Number of 10;

public static void main (String[] args) {

Scanner scan = new Scanner(System.in); //this is a scanner and name is scan for this scanner

int n = scan.nextInt(); //this is a integer

for(int i=1;i<=n;i++) {

System.out.println(i);

}

}

}

Question: Write a java program to print sum of n Natural Number In java .
Ans:

package HelloWorld;

import java.util.Scanner;

public class LearningJava {

// write a java program to sum N natural Number of 10;

public static void main (String[] args) {

Scanner scan = new Scanner(System.in); //This is a scanner

int n = scan.nextInt();

int sum = 0;    //this is sum to store sum

for(int i =1;i<=n;i++) {

sum = sum+i;    //adding sum with i

System.out.println(i);

}

System.out.print("Total Add of Number" + "= "+ sum);

}

}

 

Question: Check character is vowel or Consonant In java.
Ans: 

package HelloWorld;

import java.util.Scanner;

public class LearningJava {

// A , E , I , O , U

public static void main (String[] args) {

Scanner scan = new Scanner(System.in);

char ch = scan.next().charAt(0);

if(ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch =='U' || ch == 'a' || ch == 'e' || ch =='i'||ch=='o'||ch=='u') {

System.out.print("Character is Vovel");

}

else {

System.out.print("Consonant");

}

}

}