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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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rai said:Sat, May 6, 2017, 5:06:51 am

Language:

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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Jyoti Choudhary said:Sat, June 17, 2017, 10:46:30 am

Language:

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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aditya said:Sat, July 1, 2017, 9:49:01 am

Language:

<!DOCTYPE html>
<html>
<body>
<?php 
function Upper_lower() {
    
$str ="HEllo"// input string
    
echo  "Input string is :" $str."<br/>";
    
$var str_split($str); /* conversion of string into array */
    
$arrlength=count ($var); /* counting lengh of array */
    
$arr=array();
    for(
$i=0$i$arrlength$i++)   
    {        
         
$arr[$i]=   ord($var[$i]);
    }
    for(
$x=0$x$arrlength$x++)
    {
         if(
$arr[$x]>=65 && $arr[$x]<=92)
        {
        
$arr[$x]=$arr[$x]+32;
        }
        else
        {
            
$arr[$x]=$arr[$x]-32;
        }
    }
    for(
$j=0$j$arrlength$j++)    
    {
         
$var[$j]=   chr($arr[$j]);
    }
       
$nameimplode ("",$var); /* conversion of array into string */
       
echo $name;  /* printing string without vowels */
}
Upper_lower() ;
?>  

</body>
</html>

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Neha said:Thu, July 6, 2017, 9:00:45 pm

Language:

#include<conio.h>
#include<string.h>
void main()
{
  clrscr();
  char str[20];
  int i;
  cout<<"Enter the String  : ";
  gets(str);
  for(i=0;i<=strlen(str);i++)
  {
        if(str[i]>=65 && str[i]<=92)
        {
        str[i]=str[i]+32;
        }
        else{
            str[i]=str[i]-32;
        }
  }
  cout<<"\nThe String in  = "<<str;
  getch();
}

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