JAVA Practice Set 1

Questions:

Q1:    Write a program to sum three numbers in JAVA.

Q2:    Write a program to calculate CGPA using marks of three subjects.

Q3:    Write a JAVA program which asks the user to enter his/her name and greets them with "Hello                       <name> have a good day!" txt.

Q4:    Write a JAVA program to calculate Kilometers to Miles.

Q5:    Write a JAVA program to detect whether a number entered by the user is integer or not.

Solutions: 

package com.company;

import javax.swing.plaf.synth.SynthOptionPaneUI;
import java.util.Scanner;

public class PS1 {
    public static void main(String[] args) {

//        QUESTION 1

        System.out.println("Question 1");
        System.out.println("Sum of Three Numbers");
        int a = 10;
        int b = 20;
        int c = 30;
        int sum = a+b+c;
        System.out.println(sum + "\n");

//        QUESTION 2

        System.out.println("Question 2");
        System.out.println("CGPA calculation of three subjects");
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter the number of Subject 1");
        float sub1 = sc.nextFloat();
        System.out.println("Enter the number of Subject 2");
        float sub2 = sc.nextFloat();
        System.out.println("Enter the number of Subject 3");
        float sub3 = sc.nextFloat();
        System.out.println("Your CGPA is --- ");
        float CGPA = (sub1+sub2+sub3)/30;
        System.out.println(CGPA + "\n");

//        QUESTION 3

        System.out.println("Question 3");
        Scanner sc1 = new Scanner(System.in);
        System.out.println("Enter your name");
        String name = sc1.next();
        System.out.println("Hello "+ name +" have a good day!\n");

//        QUESTION 4

        System.out.println("Question 4");
        System.out.println("Kilometers to Miles Conversion\n");
        System.out.println("Enter Kilometers value");
        Scanner sc2 = new Scanner(System.in);
        float km = sc2.nextFloat();
        System.out.println("Miles");
        System.out.println(km / 1.609);

//        QUESTION 5

        System.out.println("Question 5");
        System.out.println("Enter the value");
        Scanner sc3 = new Scanner(System.in);
        System.out.println(sc3.hasNextInt());
    }
}