REVIEW

a)

import java.util.Scanner;
public class Initials {
    public static void main(String [] args) {
        Scanner sc = new Scanner(System.in);
        System.out.print("Enter your name: ");
        String first = sc.next();
        String last = sc.next();
        String initials = first.charAt(0)+"."+last.charAt(0)+".";
        System.out.println("Initials: " + initials);
    }
}


b)

1. Answer: 32
2. Answer: e
3. Answer: hannah.charAt(15)

c) 

public class Decode {
    public static void main(String [] args) {
        String s = "Iqqf\"Lqd#\"[qw\"hkiwtgf\"kv\"qwv#";
        String message="";
        for(int i = 0; i < s.length(); i++) {
            char c = s.charAt(i); //get current char
            c -= 2; //shift down by 2
            message += c; //append to String
        }
        System.out.println(message); //Good Job! You figured it out!
    }
}

d) 

a. Answer: AB-1X
b. Answer: Denver
c. Answer: false

e) 

int count = 0;
if(Character.isUpperCase(sentence.charAt(0))) { //if the first letter is upper case
   count++;//count it!
}

int space = sentence.indexOf(" ");//finds the index of the first space
while (space != -1) {//as long as there are spaces in the sentence
   if(Character.isUpperCase(sentence.charAt(space + 1))) { //if the first letter of the next word (after the space) is upper case
      count++;//count it too!
   }
   space = sentence.indexOf(" ", space + 1);//continue updating the value for loc based on the next location of a space
}

System.out.println("There are " + count + " words that start with an uppercase letter.");

f)

import java.util.Scanner;
public class CountVowels {
    public static void main(String [] args) {
        Scanner sc = new Scanner (System.in);
        System.out.print("Enter a String: ");
        String s = sc.nextLine();

        int countVowels = 0;

        for(int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            if(c == 'A' || c == 'E' || c == 'I' || c == 'O' || c == 'U' || c == 'a' || c == 'e' || c == 'i' || c == 'o' || c == 'u') {
                countVowels++;
            }
        }

        System.out.println("Number of vowels: " + countVowels);

    }
}