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If a number 972 is entered through the keyboard, your program should print “Nine Seven Two”. Write a program such that it does this for any positive integer.
Below is a Java program that takes a positive integer as input and prints out each digit in words. This is achieved by first converting the integer to a string, then iterating over each character in the string and using a switch statement to print the corresponding word for each digit.
Convert digits to words
import java.util.Scanner;
public class NumberToWords {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter a positive integer: ");
int number = scanner.nextInt();
String numberString = Integer.toString(number);
for (char digit : numberString.toCharArray()) {
switch (digit) {
case '0':
System.out.print("Zero ");
break;
case '1':
System.out.print("One ");
break;
case '2':
System.out.print("Two ");
break;
case '3':
System.out.print("Three ");
break;
case '4':
System.out.print("Four ");
break;
case '5':
System.out.print("Five ");
break;
case '6':
System.out.print("Six ");
break;
case '7':
System.out.print("Seven ");
break;
case '8':
System.out.print("Eight ");
break;
case '9':
System.out.print("Nine ");
break;
default:
System.out.print("Invalid digit ");
break;
}
}
}
}
Explanation:
- Scanner Setup: We use
Scannerto read the input from the user. - Convert Number to String: The entered integer is converted to a string using
Integer.toString(number). - Iterate over Characters: We iterate over each character in the string representation of the number.
- Switch Statement: For each character, a switch statement is used to print the corresponding word. Each case corresponds to a digit from ‘0’ to ‘9’.
- Print Word: Depending on the digit, the appropriate word is printed with a space following it.
Sample Output:
If the user inputs 972, the program will output:
Nine Seven Two
This approach will work for any positive integer entered by the user.
