Question

JAVA Array

3. Write a method called noVowels that takes a String as input and returns true if it doesn't contain any vowels (a, e, i, o, u)

Answer 1

import java.util.Scanner;
class Main2
{
public static void main(String[] args)
{
   System.out.print("Enter a string : ");
       Scanner sc = new Scanner(System. in);
String line = sc. nextLine();               //reading string
            Boolean k;
            k=noVowels(line);                       //functoin call to noVowels function
            System.out.println(k);                   //printing the result either true or false;

}

public static Boolean noVowels(String line)
{
   int vowels = 0;                   //we are initalizing the vowels count to zero .
       line = line.toLowerCase();       //we are converting the upper case lettr to lowercase because it menstioned with vowels(a,e,i,o,u) only
       for(int i = 0; i < line.length(); ++i)       //running for loop upto the the string lenght
{
char ch = line.charAt(i);               //we are extracting the single charcter from the string
if(ch == 'a' || ch == 'e' || ch == 'i'   //we are comparing the each and every character with lower case lettters only we are using the logical OR operator
|| ch == 'o' || ch == 'u')
           {
++vowels;                           //if we found any vowel in the string we are incrementing count of vowel by one
}
  
}
      
       if(vowels==0)                   //checking if vowel count ==0 then it doesnot contain any vowels.
               return true;           //returning the true
           else
               return false;       //       if it contain atleast one vowel the it print as false.

}
}

OUTPUT:

case1:

C:\Users\rajesh\Desktop>javac Main2.java

C:\Users\rajesh\Desktop>java Main2
Enter a string : klgdfs
true

CASE2:

C:\Users\rajesh\Desktop>javac Main2.java

C:\Users\rajesh\Desktop>java Main2
Enter a string : ramu
false

Catherstrajesh Desktop Man2java - Notepad Edit Search View Encoding Language Settings Tools Macro Run Plugins Window ? Mart2java Ex import java.util.Scanner; class Main2 2 public static void main(String[] args) Syatem.out.print("Enter a string : "); Scanner SC = new Scanner(System.in); String line - sc. nextLine(); Boolean k: knoVowels (line); System.out.println(k): 1/reading string //functoin call to noVowels function 1/printing the result either true or false; min public static Boolean novowels (String line) int vowels = 0; //we are initalizing the vowels count to zero. line - line.toLowerCase(); 77we are converting the upper case lettr to lowercase because it menstioned with vowelslae. .0.) only for (int i 0; i <line.length(); ++i) //running for loop upto the the string lenght char ch = line.charAt(i); if (ch= aIl ch -- e'll ch == '1' Il ch = 'O' Il ch - '') 77we are extracting the single charcter from the string // we are comparing the cach and every character with lower case letters only // we are using the logical OR operator ++vowels; 1/if we found any vowel in the string we are incrementing count of vowel by one //checking if vowel count ==0 then it doesnot contain any vowels. //returning the true if (vowels=0) return true; else return false; if it contain atleast one vowel the it print as false.

C:\Users\rajesh\Desktop>javac Main2.java C:\Users\rajesh\Desktop>java Main2 Enter a string : kigdfs true C:\Users\rajesh\Desktop>javac Main2.java C:\Users\rajesh\Desktop>java Main2 Enter a string : ramu false C:\Users\rajesh\Desktop