Question

1. Read a line of input from the user (as a string) and find out if there are any vowels in the string. Use a break or continue keyword (whichever is appropriate) to notify that a vowel has been found. Prompt for another string and search again until the user enters 'exit' into the program.

2. Ask the user how many random numbers they would like to see. Ask the user to provide the lowest number they would like to use and the highest number. Only return integers between those two numbers.

Java language

Answer 1

1)Java program:

import java.util.Scanner;

public class VowelFinder {
   public static void main(String[] arg) {
       //Scanner class object to read input from keyboard
       Scanner in = new Scanner(System.in);
      
       //asking user input
       System.out.print("Enter string:");
       String line = in.nextLine();
      
       //converting user input into lowercase
       line = line.toLowerCase();
      
       //while loop till user enters 'exit'
       while(!line.equalsIgnoreCase("exit")) {
           //for loop to traverse on the line
           for(int i = 0; i < line.length(); ++i)
   {
               //getting each character from the line
   char ch = line.charAt(i);
   //condition to check char is vowel or not
   if(ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u') {
   System.out.println("Vowel has been found");
   break;//Use a break
   }
   }
           //Prompt for another string
           System.out.print("Enter string:");
           line = in.nextLine();
       }
   }
}

Output:

2)Java program:

import java.util.Random;
import java.util.Scanner;

public class RandomNumGenerator {
  
   public static void main(String[] arg) {
       //Random number instance to generate random numbers
       Random r = new Random();
      
       //Scanner class object to read input from keyboard
       Scanner in = new Scanner(System.in);
      
       //asking user input
       System.out.print("How many random numbers would you like to see?:");
       int numOfRandomNums = in.nextInt();
      
       System.out.print("Provide the lowest number would you like to use:");
       int lowestNum = in.nextInt();
      
       System.out.print("Provide the highest number would you like to use:");
       int highestNum = in.nextInt();
      
       //for loop to generate 'numOfRandomNums' random numbers
       for(int i=1;i<=numOfRandomNums;i++) {
           // Generating random integers from lowestNum to highestNum
           int randomNum = r.nextInt((highestNum - lowestNum) + 1) + lowestNum;
           System.out.println(randomNum);
       }          
   }
}

Output: