Question

Write a JAVA program that prompts the user to enter a character c that represents a binary digit (a bit!). (Recall that c can be only “0” or “1.”) Your program must use the character type for the input. If the user enters a character “x” that is not a bit, you must print out the following error message: “The character x is invalid: x is not a bit.” If the character c is a bit, your main program must print out its value in decimal. Example 1: If the user enters the character “0,” your program must print out the value 0. Example 2: If the user enters the character “1,” your program must print out the value 1. Example 3: If the user enters the character “B,” your program must print out the following error message: “The character B is invalid: B is not a bit.”

Answer 1

Code:

import java.util.Scanner;
//importing java scanner to take input from the user

public class Main {
    public static void main(String[] args) {
      
      
        Scanner scan = new Scanner(System.in);
        char n;
      
        //taking input from the user
        System.out.print("Please enter the Character: ");
      
        //storing it in a variable named "n"
        n = scan.next().charAt(0);
      
      
        //checking whether the input is 1 bit binary or not using if else condition
        if(n=='0' || n=='1'){
            //if the input is 1 bit binary number printing the number
            System.out.println(n);
        }
        else{
            //otherwise printing the error message
            System.out.println("Character "+n+" is invalid: "+n+" is not a bit");

        }
    }
}

Explanation:

The java code takes the character as input from the user

If the input is a 1 bit binary number i.e, "0" or "1" it will print the decimal value

Otherwise it will print he error message i.e

"The character is invalid: character not a Bit"

Screenshot of the Code:

Screenshot of the Output when the input is "1":

Screenshot of the Output when the input is "0":

Screenshot of the Output when the input is invalid character: