#Logic How to convert String Characters lower to upper and upper to low...

How to convert String Characters.  lower to upper and upper to lower

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How to Convert all the String character Upper and lower. If String character is lower than convert Upper If it is Upper than you have to convert a lower. I am going to introduce it is a very simple and easy way. String Conversion is very easy through the toUpperCase() and toLowerCase(); Method But I am going to do this Question without using the Inbuilt method in the class.

You have to do this Only For logical coding Question.

So, Finally, I am going to do this Question step-by-step if you want to watch videos than you can watch. In these videos, I discuss this question in a very simple and easy way.

1. You have to take one class with the main method.   

            class Test{

                public static void main(){

                   //your logic

              }

         }

    2. After that you can start the Writing the Logic Make sure that you have knowledge for logic than only you can write the logic.

    
         import java.util.Scanner;
        class Test{

                public static void main(){

                   Scanner sc=new Scanner(System.in);
                    String name=sc.next();
                   //1.Method
                     String s=name.toLowerCase(name);  
                    if(name.equals(s)) {
                              s=s.toUpperCase();
                            System.out.println(s); 
                      }
                 else{
                             System.out.println(s);
                   }

              }

         }

 Convert Lowercase to Uppercase in java and Uppercase to Lowercase without using the built-in method?

Coding Part:

import java.util.*;

class Nit{

  public static void main(String args[]){ 

         Scanner sc=new Scanner(System.in);  

         String s=sc.next();   

         String s1="";

               System.out.println("Original:"+s);  

            for(int i=0;i<s.length();i++){    

             char ch=s.charAt(i);

int a=(int)ch;

if(a>=65&&a<=97){

              a=a+32;

  }

else{      

             a=a-32;

           }

          s1=s1+(char)a;

       }   

    System.out.println("Modified String:"+s1);
 }

}

Output:

prince

Original: prince

Modified String: PRINCE

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