Assignment 86

code

///Name: Mutsu Osoegawa
///Period: 7
///Project Name: Letter at a Time
///File Name: ProjectAtATime.java
///Date: 2/18/2016

import java.util.Scanner;

public class LetterAtATime
{
	public static void main( String[] args )
	{
		Scanner kb = new Scanner(System.in);

		System.out.print("What is your message? ");
		String message = kb.nextLine();

		System.out.println("\nYour message is " + message.length() + " characters long.");
		System.out.println("The first character is at position 0 and is '" + message.charAt(0) + "'.");
		int lastpos = message.length() - 1;
		System.out.println("The last character is at position " + lastpos + " and is '" + message.charAt(lastpos) + "'.");
		System.out.println("\nHere are all the characters, one at a time:\n");

		for ( int i=0; i< message.length(); i++ )
		{
			System.out.println("\t" + i + " - '" + message.charAt(i) + "'");
		}
        //program stops running after i equals message.length because it runs out of letters to change.
        //if string variable contains the value box, the length will be 3 and the position of the last letter weill be 2. 
        //the for loop repeats as long as mesage length is < not <= because the last position one less than message length which corresponds with the int i. 
        
		int vowel_count = 0;

		for ( int i=0; i < message.length(); i++ )
		{
			char letter = message.charAt(i);
			if ( letter == 'a' || letter == 'A' || letter == 'e' || letter == 'E' || letter == 'i' || letter == 'o' ||letter == 'O' || letter == 'u' || letter == 'U' )
			{
				vowel_count++;
			}
		}

		System.out.println("\nYour message contains " + vowel_count + " vowels. Isn't that interesting?");

	}
}