Java Program to Print an Integer (Entered by the User)

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Java Program to Print an Integer (Entered by the User)

In this program, you'll learn to print a number entered by the user in Java. The integer is stored in a variable using System.in, and is displayed on the screen using System.out.

import java.util.Scanner;
class Test 
{
   public static void main(String[] args) 
    {  
     int number;
     Scanner op=new Scanner(System.in);
     System.out.print("Enter any number:");
     number=op.nextInt();
     System.out.println("Display Number:"+number);
    }  
}  

Output:

Enter any number:31

Display Number:31

In this program, an object of Scanner class, reader is created to take inputs from standard input, which is keyboard.

Then, Enter a number prompt is printed to give the user a visual cue as to what they should do next.

reader.nextInt() then reads all entered integers from the keyboard unless it encounters a new line character \n (Enter). The entered integers are then saved to the integer variable number.

If you enter any character which is not an integer, the compiler will throw an InputMismatchException.

Finally, number is printed onto the standard output (System.out) - computer screen using the function println().

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