Move all special char to the end of the String

In this article, we will learn how to move all special char to the end of the String.

Examples:

Input : !@$%^&*AJAY
Output :AJAY!@$%^&*

Input :Geeksf!@orgeek@s A#$ c%o^mputer s****cience p#o@rtal fo@r ge%eks
Output :Geeksforgeeks A computer science portal for geeks!@@#$%^****#@@%

Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Prerequisite : Regular Expressions in Java

The idea is to traverse input string and maintain two strings, one string that contains normal characters (a, A, 1, ‘ ‘, etc) and other string that maintains special characters (@, $, etc). Finally, concatenate the two strings and return.

Here is the implementation of above approach

C++

// C++ program move all special char to the end of the string 
  
#include <bits/stdc++.h> 
using namespace std; 
  
// Function return a string with all special 
// chars to the end 
string moveAllSC(string str) 
{ 
    // Take length of string 
    int len = str.length(); 
  
    // traverse string 
    string res1 = "", res2 = ""; 
    for (int i = 0; i < len; i++) 
    { 
        char c = str.at(i); 
  
        // check char at index i is a special char 
        if (isalnum(c) || c == ' ') 
            res1 += c; 
        else
            res2 += c; 
    } 
  
    return res1 + res2; 
} 
  
// Driver code 
int main() 
{ 
    string str1("Geeksf!@orgeek@s A#$ c%o^mputer"); 
    string str2(" s****cience p#o@rtal fo@r ge%eks"); 
    string str = str1 + str2; 
    cout << moveAllSC(str) << endl; 
    return 0; 
} 
  
// This code is contributed by 
// sanjeev2552 

Java

// Java program move all special char to the end of the string 
class GFG1 { 
  
    // Function return a string with all special  
    // chars to the end 
    static String moveAllSC(String str) 
    { 
        // Take length of string 
        int len = str.length(); 
  
        // regular expression for check char is special 
        // or not. 
        String regx = "[a-zA-Z0-9\\s+]"; 
  
        // traverse string 
        String res1 = "", res2 = ""; 
        for (int i = 0; i < len; i++) { 
          
            char c = str.charAt(i); 
  
            // check char at index i is a special char 
            if (String.valueOf(c).matches(regx))  
               res1 = res1 + c; 
            else
               res2 = res2 + c; 
        } 
        return res1 + res2; 
    } 
  
    public static void main(String args[]) 
    { 
        String str = "Geeksf!@orgeek@s A#$ c%o^mputer"
                     + " s****cience p#o@rtal fo@r ge%eks"; 
        System.out.println(moveAllSC(str)); 
    } 
} 

Python3

# Python3 program move all special char  
# to the end of the string  
  
# Function return a string with all  
# special chars to the end  
def moveAllSC(string):  
      
    # Take length of string  
    length = len(string) 
  
    # Traverse string  
    res1, res2 = "", ""  
    for i in range(0, length):  
          
        c = string[i]  
  
        # check char at index i is a special char  
        if c.isalnum() or c == " ":  
            res1 = res1 + c  
        else: 
            res2 = res2 + c  
          
    return res1 + res2  
      
# Driver Code 
if __name__ == "__main__":  
      
    string = "Geeksf!@orgeek@s A#$ c%o^mputer" \ 
            +" s****cience p#o@rtal fo@r ge%eks"
      
    print(moveAllSC(string))  
      
# This code is contributed by Rituraj Jain 

C#

// C# program move all special char  
// to the end of the string 
using System; 
using System.Text.RegularExpressions; 
  
class GFG 
{ 
  
    // Function return a string with all  
    // special chars to the end 
    static String moveAllSC(String str) 
    { 
        // Take length of string 
        int len = str.Length; 
  
        // regular expression to check  
        // char is special or not. 
        var regx = new Regex("[a-zA-Z0-9\\s+]"); 
  
        // traverse string 
        String res1 = "", res2 = ""; 
        for (int i = 0; i < len; i++) 
        { 
            char c = str[i]; 
  
            // check char at index i is a special char 
            if (regx.IsMatch(c.ToString()))  
                res1 = res1 + c; 
            else
                res2 = res2 + c; 
        } 
        return res1 + res2; 
    } 
  
    public static void Main(String []args) 
    { 
        String str = "Geeksf!@orgeek@s A#$ c%o^mputer" +  
                     " s****cience p#o@rtal fo@r ge%eks"; 
        Console.WriteLine(moveAllSC(str)); 
    } 
} 
  
// This code is contributed by PrinciRaj1992 

Output:

Geeksforgeeks A computer science portal for geeks!@@#$%^****#@@%

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Recommended: Please try your approach on {IDE} first, before moving on to the solution.

C++

Java

Python3

C#

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