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Program Discussion :: Basics
Home > Programs > Basics

3. Write a program to convert uppercase to lower case and vice versa of a given string or sentence

Answer:

import java.util.*;
import java.lang.*;
import java.io.*;


class LowerToUpper
{
    public static void main (String[] args)
    {
        int i,len;
        char ch;
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter String: ");
        String str=sc.nextLine();
        len=str.length();
        for(i=0;i<len;i++)
        {
            ch=str.charAt(i);
            if(Character.isUpperCase(ch))
                System.out.print(Character.toLowerCase(ch));
            else
                System.out.print(Character.toUpperCase(ch));
        }
    }
}

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