Java User Input Exercise

Exercise 1:

Write a simple java program to take user input of a number and store it inside an integer variable. Later print the number on the screen.

 

Solution 1:

 

import java.util.Scanner;   public class UserInpur {        public static void main(String[] args) {               Scanner sc = new Scanner(System.in);           System.out.println("Enter a number");           int x = sc.nextInt();           System.out.println("You have entered:");                  System.out.println(x);        }   }

 

Exercise 2:

Write a simple java program to take user input of two integer values and find out the large & small number.

 

Solution 2:

 

import java.util.Scanner; import java.lang.*;   public class UserInpur {        public static void main(String[] args) {               Scanner sc = new Scanner(System.in);           System.out.println("Enter 1st number");           int x = sc.nextInt();           System.out.println("Enter 2nd number");           int y = sc.nextInt();           System.out.println("The large number is "+Math.max(x,y));                 System.out.println("The small number is "+Math.min(x,y));              }   }

 

Exercise 3:

Write a simple java program to take user input of some integer values and store them inside an array. Later print those values on the screen. Make sure the size of the array is also defined by a user input.

 

Solution 3:

import java.util.Scanner; import java.lang.*;   public class UserInpur {        public static void main(String[] args) {               Scanner sc = new Scanner(System.in);           System.out.println("How many numbers do you want to enter?");           int size = sc.nextInt();           int [] numbers = new int[size];                    for (int i=0;i<size;i++) {               System.out.println("Enter number "+(i+1));               numbers[i]=sc.nextInt();           }                    System.out.println("*******************");           System.out.println("Numbers you entered:");           System.out.println("*******************");           for (int i=0;i<size;i++) {                System.out.println("Number "+(i+1)+" is:"+numbers[i]);           }        }   }

 

Exercise 4:

Write a simple java program to take user input of some integer values and store them inside an array. Now print the largest number on the screen. Make sure the size of the array is also defined by a user input.

 

Solution 4:

 

import java.util.Scanner; import java.lang.*;   public class UserInpur {        public static void main(String[] args) {               Scanner sc = new Scanner(System.in);           System.out.println("How many numbers do you want to enter?");           int size = sc.nextInt();           int [] numbers = new int[size];                     for (int i=0;i<size;i++) {               System.out.println("Enter number "+(i+1));               numbers[i]=sc.nextInt();           }                     for (int i=0;i<size;i++) {                             if(i==(size-1)) {                    System.out.println("The Largest Number is "+numbers[i]);               }else {                    if(numbers[i]>numbers[i+1]) {                         int temp = numbers[i+1];                         numbers[i+1] = numbers[i];                    }               }           }                          }   }