Given a string, convert the characters of the string into opposite case,i.e. if a character is lower case than convert it into upper case and vice-versa.
Examples:
Input : geeksForgEeks Output : GEEKSfORGeEKS Input : hello every one Output : HELLO EVERY ONE
ASCII values of alphabets: A – Z = 65 to 90, a – z = 97 to 122
Steps:
- Take one string of any length and calculate its length.
- Scan string character by character and keep checking the index .
- If character in a index is in lower case, then subtract 32 to convert it in upper case, else add 32 to convert it in lower case
- Print the final string.
C++
// CPP program to Convert characters // of a string to opposite case #include<iostream> using namespace std; // Function to convert characters // of a string to opposite case void convertOpposite(string &str) { int ln = str.length(); // Conversion according to ASCII values for (int i=0; i<ln; i++) { if (str[i]>='a' && str[i]<='z') //Convert lowercase to uppercase str[i] = str[i] - 32; else if(str[i]>='A' && str[i]<='Z') //Convert uppercase to lowercase str[i] = str[i] + 32; } } // Driver function int main() { string str = "GeEkSfOrGeEkS"; // Calling the Function convertOpposite(str); cout << str; return 0; } |
Java
// Java program to Convert characters // of a string to opposite case class Test{ // Method to convert characters // of a string to opposite case static void convertOpposite(StringBuffer str) { int ln = str.length(); // Conversion using predefined methods for (int i=0; i<ln; i++) { Character c = str.charAt(i); if (Character.isLowerCase(c)) str.replace(i, i+1, Character.toUpperCase(c)+""); else str.replace(i, i+1, Character.toLowerCase(c)+""); } } public static void main(String[] args) { StringBuffer str = new StringBuffer("GeEkSfOrGeEkS"); // Calling the Method convertOpposite(str); System.out.println(str); } } // This code is contributed by Gaurav Miglani |
Python3
# Python3 program to Convert characters # of a string to opposite case # Function to convert characters # of a string to opposite case def convertOpposite(str): ln = len(str) # Conversion according to ASCII values for i in range(ln): if str[i] >= 'a' and str[i] <= 'z': # Convert lowercase to uppercase str[i] = chr(ord(str[i]) - 32) elif str[i] >= 'A' and str[i] <= 'Z': # Convert lowercase to uppercase str[i] = chr(ord(str[i]) + 32) # Driver code if __name__ == "__main__": str = "GeEkSfOrGeEkS" str = list(str) # Calling the Function convertOpposite(str) str = ''.join(str) print(str) # This code is contributed by # sanjeev2552 |
C#
// C# program to Convert characters // of a string to opposite case using System; using System.Text; class GFG{ // Method to convert characters // of a string to opposite case static void convertOpposite(StringBuilder str) { int ln = str.Length; // Conversion according to ASCII values for (int i=0; i<ln; i++) { if (str[i]>='a' && str[i]<='z') //Convert lowercase to uppercase str[i] = (char)(str[i] - 32); else if(str[i]>='A' && str[i]<='Z') //Convert uppercase to lowercase str[i] = (char)(str[i] + 32); } } // Driver code public static void Main() { StringBuilder str = new StringBuilder("GeEkSfOrGeEkS"); // Calling the Method convertOpposite(str); Console.WriteLine(str); } } // This code is contributed by PrinciRaj1992 |
Output:
gEeKsFoRgEeKs
Time Complexity: O(n)
Note: This program can alternatively be done using C++ inbuilt functions – Character.toLowerCase(char) and Character.toUpperCase(char).
This article is contributed by Rishabh Jain. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
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