Q:

Program to replace lower-case characters with upper-case and vice versa

belongs to collection: String Programs

robaa
Save to bookmark
|
2022-11-09
|
  190 
0

Here, our task is to replace all the lower-case characters in the string to upper-case and upper-case characters to lower-case. For this purpose, we need to traverse the string and check for each character. If the character is a lower-case character, make it upper-case by using the language-specific built-in method or add 32 to the lower-case character in C to change the ASCII value of the character.

Algorithm

  1. Define a string and traverse through it.
  2. If the lower-case character is encountered then convert them in upper case character using built-in function.
  3. If the upper-case character is encountered then convert them in upper case character using built-in function.
  4. If it's a character other than upper-case or lower-case alphabet take the character as it is.

Input:

str1 = "Great Power"  

Output:

String after case conversion : gREAT pOWER
Php programming, Python programming, Java programming, C programming, c# programming, examples, Php programming examples, Python programming examples, Java programming examples, C programming examples, c# programming examples,
login and add your own answer to this question

All Answers

robaa
2022-11-09
need an explanation for this answer? contact us directly to get an explanation for this answer

Python

str1="Great Power";  
newStr = "";  
   
for i in range(0, len(str1)):  
    #Checks for lower case character  
    if str1[i].islower():  
        #Convert it into upper case using upper () function  
        newStr += str1[i].upper();  
    #Checks for upper case character  
    elif str1[i].isupper():  
        #Convert it into lower case using lower () function  
        newStr += str1[i].lower();  
      
    else:  
        newStr += str1[i];          
print("String after case conversion : " +  newStr);

 

Output:

String after case conversion : gREAT pOWER

 

C

#include <stdio.h>  
int main()  
{  
    int i, len = 0;  
    char str[] = "Great Power";  
      
    //Calculating length of the array  
    len = sizeof(str)/sizeof(str[0]);  
      
    //Checks every character in the array  
    for(i = 0; i < len; i++){  
          
        //Checks whether a character is upper case character  
        if(isupper(str[i])){  
            //Convert that charcter to lower case  
            str[i] = tolower(str[i]);  
        }  
        //Checks whether a character is lower case character  
        else if(islower(str[i])){  
            //Convert that charcter to upper case  
            str[i] = toupper(str[i]);  
        }  
    }  
    printf("String after case conversion : %s", str);  
    return 0;  
}

 

Output:

String after case conversion : gREAT pOWER

 

JAVA

public class changeCase {  
    public static void main(String[] args) {  
          
        String str1="Great Power";  
        StringBuffer newStr=new StringBuffer(str1);  
          
        for(int i = 0; i < str1.length(); i++) {  
              
            //Checks for lower case character  
            if(Character.isLowerCase(str1.charAt(i))) {  
                //Convert it into upper case using toUpperCase() function  
                newStr.setCharAt(i, Character.toUpperCase(str1.charAt(i)));  
            }  
            //Checks for upper case character  
            else if(Character.isUpperCase(str1.charAt(i))) {  
                //Convert it into upper case using toLowerCase() function  
                newStr.setCharAt(i, Character.toLowerCase(str1.charAt(i)));  
            }  
        }  
        System.out.println("String after case conversion : " + newStr);  
    }  
}

 

 

Output:

String after case conversion : gREAT pOWER

 

C#

using System;  
public class Program  
{  
    public static void Main()  
    {  
        string str1="Great Power";  
        char ch;  
        System.Text.StringBuilder str2 = new System.Text.StringBuilder();  
   
        for(int i = 0; i < str1.Length; i++) {  
            //Checks for lower case character  
            if(char.IsLower(str1[i])) {  
                //Convert it into upper case using ToUpper() function  
                ch = Char.ToUpper(str1[i]);  
                //Append that character to new character  
                str2.Append(ch);  
            }  
            //Checks for lower case character  
            else if(char.IsUpper(str1[i])) {  
                //Convert it into lower case using ToLower() function  
                ch = Char.ToLower(str1[i]);  
                //Append that character to new character  
                str2.Append(ch);  
            }  
            else{  
                ch = str1[i];  
                str2.Append(ch);  
            }  
        }  
        Console.WriteLine("String after case conversion : " + str2);  
    }  
}

 

Output:

String after case conversion : gREAT pOWER

 

PHP

<!DOCTYPE html>  
<html>  
<body>  
<?php  
    $str1 = "Great Power";  
    for($i = 0; $i < strlen($str1); $i++){  
        //Checks for lower case character  
        if($str1[$i] >= 'a' && $str1[$i] <= 'z'){  
            //Convert it into upper case using strtoupper() function  
            $str1[$i] = strtoupper($str1[$i]);  
        }  
        //Checks for lower case character  
        elseif($str1[$i] >= 'A' && $str1[$i] <= 'Z'){  
            //Convert it into upper case using strtolower() function  
            $str1[$i] = strtolower($str1[$i]);  
        }  
    }  
echo "String after case conversion : $str1";  
?>  
</body>  
</html>

 

Output:

String after case conversion : gREAT pOWER

need an explanation for this answer? contact us directly to get an explanation for this answer

total answers (1)

String Programs
This question belongs to these collections

Similar questions

need a help?

find thousands of online teachers now
Program to replace the spaces of a string with a s... >>
<< Program to remove all the white spaces from a stri...