INPUT FROM USER

TAKING INPUT FROM USER :

Like in C++  .  cout and cin commands were contained by library iostream.h 

And to use cin and cout commands in a program , we used to write :

            

                    #include <iostream.h>

In the similar way , for taking input from user in JAVA , Scanner class is used and this is contained in in-built package      util . 

We will see how scanner method is used :

                 

                                      import java.util.*;

               class ScanDemo

               {

                     public static void main(String args[])

                     {

                          Scanner s = new Scanner(System.in);

                          // an object s of scanner class is                                  created

                           

                           System.out.println("Num1");

                           int a = s.nextInt();

                           System.out.println("Num2");

                           int b = s.nextInt();

                           System.out.println(a+b);

                     }

               }

nextInt is an inbuilt method in scanner class which takes integer as input . 

The input from user can be taken in form of character or string or can have any data type .

Like in C++ keyword #include was used to access the classes of any library , in JAVA keyword import is used for including any in-built class.

We will see later in PACKAGES how in-built classes are kept in packages and how to acces and create package  

To refer how to take other data types as input from user please refer :

Posted in: Input from User