Given string str of length N, the task is to remove uppercase, lowercase, special, numeric, and non-numeric characters from this string and print the string after the simultaneous modifications.
Examples:
Input: str = “GFGgfg123$%”
Output: After removing uppercase characters: gfg123$%
After removing lowercase characters: GFG123$%
After removing special characters: GFGgfg123
After removing numeric characters: GFGgfg$%
After removing non-numeric characters: 123
Input: str = “J@va12”
Output: After removing uppercase characters: @va12
After removing lowercase characters: J@12
After removing special characters: Jva12
After removing numeric characters: J@va
After removing non-numeric characters: 12
Naive Approach: The simplest approach is to iterate over the string and remove uppercase, lowercase, special, numeric, and non-numeric characters. Below are the steps:
1. Traverse the string character by character from start to end.
2. Check the ASCII value of each character for the following conditions:
- If the ASCII value lies in the range of [65, 90], then it is an uppercase character. Therefore, skip such characters and add the rest characters in another string and print it.
- If the ASCII value lies in the range of [97, 122], then it is a lowercase character. Therefore, skip such characters and add the rest characters in another string and print it.
- If the ASCII value lies in the range of [32, 47], [58, 64], [91, 96], or [123, 126] then it is a special character. Therefore, skip such characters and add the rest characters in another string and print it.
- If the ASCII value lies in the range of [48, 57], then it is a numeric character. Therefore, skip such characters and add the rest characters in another string and print it.
- Else the character is a non-numeric character. Therefore, skip such characters and add the rest characters in another string and print it.
Time Complexity: O(N)
Auxiliary Space: O(1)
Regular Expression Approach: The idea is to use regular expressions to solve this problem. Below are the steps:
1. Create regular expressions to remove uppercase, lowercase, special, numeric, and non-numeric characters from the string as mentioned below:
- regexToRemoveUpperCaseCharacters = “[A-Z]”
- regexToRemoveLowerCaseCharacters = “[a-z]”
- regexToRemoveSpecialCharacters = “[^A-Za-z0-9]”
- regexToRemoveNumericCharacters = “[0-9]”
- regexToRemoveNon-NumericCharacters = “[^0-9]”
2. Compile the given regular expressions to create the pattern using Pattern.compile() method.
3. Match the given string with all the above Regular Expressions using Pattern.matcher().
4. Replace every matched pattern with the target string using the Matcher.replaceAll() method.
Below is the implementation of the above approach:
C++
// C++ program to remove uppercase, lowercase// special, numeric, and non-numeric characters#include <iostream>#include <regex>using namespace std;// Function to remove uppercase charactersstring removingUpperCaseCharacters(string str){ // Create a regular expression const regex pattern("[A-Z]"); // Replace every matched pattern with the // target string using regex_replace() method return regex_replace(str, pattern, "");}// Function to remove lowercase charactersstring removingLowerCaseCharacters(string str){ // Create a regular expression const regex pattern("[a-z]"); // Replace every matched pattern with the // target string using regex_replace() method return regex_replace(str, pattern, "");}// Function to remove special charactersstring removingSpecialCharacters(string str){ // Create a regular expression const regex pattern("[^A-Za-z0-9]"); // Replace every matched pattern with the // target string using regex_replace() method return regex_replace(str, pattern, "");}// Function to remove numeric charactersstring removingNumericCharacters(string str){ // Create a regular expression const regex pattern("[0-9]"); // Replace every matched pattern with the // target string using regex_replace() method return regex_replace(str, pattern, "");}// Function to remove non-numeric charactersstring removingNonNumericCharacters(string str){ // Create a regular expression const regex pattern("[^0-9]"); // Replace every matched pattern with the // target string using regex_replace() method return regex_replace(str, pattern, "");}int main(){ // Given String str string str = "GFGgfg123$%"; // Print the strings after the simultaneous // modifications cout << "After removing uppercase characters: " << removingUpperCaseCharacters(str) << endl; cout << "After removing lowercase characters: " << removingLowerCaseCharacters(str) << endl; cout << "After removing special characters: " << removingSpecialCharacters(str) << endl; cout << "After removing numeric characters: " << removingNumericCharacters(str) << endl; cout << "After removing non-numeric characters: " << removingNonNumericCharacters(str) << endl; return 0;}// This article is contributed by yuvraj_chandra |
Java
// Java program to remove uppercase, lowercase// special, numeric, and non-numeric charactersimport java.util.regex.Matcher;import java.util.regex.Pattern;public class GFG{ // Function to remove uppercase characters public static String removingUpperCaseCharacters(String str) { // Create a regular expression String regex = "[A-Z]"; // Compile the regex to create pattern // using compile() method Pattern pattern = Pattern.compile(regex); // Get a matcher object from pattern Matcher matcher = pattern.matcher(str); // Replace every matched pattern with the // target string using replaceAll() method return matcher.replaceAll(""); } // Function to remove lowercase characters public static String removingLowerCaseCharacters(String str) { // Create a regular expression String regex = "[a-z]"; // Compile the regex to create pattern // using compile() method Pattern pattern = Pattern.compile(regex); // Get a matcher object from pattern Matcher matcher = pattern.matcher(str); // Replace every matched pattern with the // target string using replaceAll() method return matcher.replaceAll(""); } // Function to remove special characters public static String removingSpecialCharacters(String str) { // Create a regular expression String regex = "[^A-Za-z0-9]"; // Compile the regex to create pattern // using compile() method Pattern pattern = Pattern.compile(regex); // Get a matcher object from pattern Matcher matcher = pattern.matcher(str); // Replace every matched pattern with the // target string using replaceAll() method return matcher.replaceAll(""); } // Function to remove numeric characters public static String removingNumericCharacters(String str) { // Create a regular expression String regex = "[0-9]"; // Compile the regex to create pattern // using compile() method Pattern pattern = Pattern.compile(regex); // Get a matcher object from pattern Matcher matcher = pattern.matcher(str); // Replace every matched pattern with the // target string using replaceAll() method return matcher.replaceAll(""); } // Function to remove non-numeric characters public static String removingNonNumericCharacters(String str) { // Create a regular expression String regex = "[^0-9]"; // Compile the regex to create pattern // using compile() method Pattern pattern = Pattern.compile(regex); // Get a matcher object from pattern Matcher matcher = pattern.matcher(str); // Replace every matched pattern with the // target string using replaceAll() method return matcher.replaceAll(""); } // Driver Code public static void main(String[] args) { // Given String str String str = "GFGgfg123$%"; // Print the strings after the simultaneous // modifications System.out.println( "After removing uppercase characters: " + removingUpperCaseCharacters(str)); System.out.println( "After removing lowercase characters: " + removingLowerCaseCharacters(str)); System.out.println( "After removing special characters: " + removingSpecialCharacters(str)); System.out.println( "After removing numeric characters: " + removingNumericCharacters(str)); System.out.println( "After removing non-numeric characters: " + removingNonNumericCharacters(str)); }} |
Python3
# Python3 program to remove# uppercase, lowercase special,# numeric, and non-numeric charactersimport re# Function to remove# uppercase charactersdef removingUpperCaseCharacters(str): # Create a regular expression regex = "[A-Z]" # Replace every matched pattern # with the target string using # sub() method return (re.sub(regex, "", str))# Function to remove lowercase# charactersdef removingLowerCaseCharacters(str): # Create a regular expression regex = "[a-z]" # Replace every matched # pattern with the target # string using sub() method return (re.sub(regex, "", str))def removingSpecialCharacters(str): # Create a regular expression regex = "[^A-Za-z0-9]" # Replace every matched pattern # with the target string using # sub() method return (re.sub(regex, "", str))def removingNumericCharacters(str): # Create a regular expression regex = "[0-9]" # Replace every matched # pattern with the target # string using sub() method return (re.sub(regex, "", str))def removingNonNumericCharacters(str): # Create a regular expression regex = "[^0-9]" # Replace every matched pattern # with the target string using # sub() method return (re.sub(regex, "", str))str = "GFGgfg123$%"print("After removing uppercase characters:", removingUpperCaseCharacters(str))print("After removing lowercase characters:", removingLowerCaseCharacters(str))print("After removing special characters:", removingSpecialCharacters(str))print("After removing numeric characters:", removingNumericCharacters(str))print("After removing non-numeric characters:", removingNonNumericCharacters(str))# This code is contributed by avanitrachhadiya2155 |
C#
// C# program to remove uppercase, lowercase// special, numeric, and non-numeric charactersusing System;using System.Text.RegularExpressions;public class GFG{ // Function to remove uppercase characters public static string removingUpperCaseCharacters(string str) { // Create a regular expression string regex = "[A-Z]"; // Replace every matched pattern with the // target string using Replace method return Regex.Replace(str, regex, ""); } // Function to remove lowercase characters public static string removingLowerCaseCharacters(string str) { // Create a regular expression string regex = "[a-z]"; // Replace every matched pattern with the // target string using Replace method return Regex.Replace(str, regex, ""); } // Function to remove special characters public static string removingSpecialCharacters(string str) { // Create a regular expression string regex = "[^A-Za-z0-9]"; // Replace every matched pattern with the // target string using Replace method return Regex.Replace(str, regex, ""); } // Function to remove numeric characters public static string removingNumericCharacters(string str) { // Create a regular expression string regex = "[0-9]"; // Replace every matched pattern with the // target string using Replace method return Regex.Replace(str, regex, ""); } // Function to remove non-numeric characters public static string removingNonNumericCharacters(string str) { // Create a regular expression string regex = "[^0-9]"; // Replace every matched pattern with the // target string using Replace method return Regex.Replace(str, regex, ""); } // Driver Code public static void Main() { // Given string str string str = "GFGgfg123$%"; // Print the strings after the simultaneous // modifications Console.WriteLine( "After removing uppercase characters: " + removingUpperCaseCharacters(str)); Console.WriteLine( "After removing lowercase characters: " + removingLowerCaseCharacters(str)); Console.WriteLine( "After removing special characters: " + removingSpecialCharacters(str)); Console.WriteLine( "After removing numeric characters: " + removingNumericCharacters(str)); Console.WriteLine( "After removing non-numeric characters: " + removingNonNumericCharacters(str)); }}// This code is contributed by Aman Kumar. |
Javascript
// Javascript program to remove uppercase, lowercase// special, numeric, and non-numeric characters// Function to remove uppercase charactersfunction removingUpperCaseCharacters(str){// Create a regular expressionlet pattern = new RegExp("[A-Z]",'g');// Replace every matched pattern with the// target string using str.replace() methodreturn str.replace(pattern, "");}// Function to remove lowercase charactersfunction removingLowerCaseCharacters(str){// Create a regular expressionlet pattern = new RegExp("[a-z]",'g');// Replace every matched pattern with the// target string using str.replace() methodreturn str.replace(pattern, "");}// Function to remove special charactersfunction removingSpecialCharacters(str){// Create a regular expressionlet pattern = new RegExp("[^A-Za-z0-9]",'g');// Replace every matched pattern with the// target string using str.replace() methodreturn str.replace(pattern, "");}// Function to remove numeric charactersfunction removingNumericCharacters(str){// Create a regular expressionlet pattern = new RegExp("[0-9]",'g');// Replace every matched pattern with the// target string using str.replace() methodreturn str.replace(pattern, "");}// Function to remove non-numeric charactersfunction removingNonNumericCharacters(str){// Create a regular expressionlet pattern = new RegExp("[^0-9]",'g');// Replace every matched pattern with the// target string using str.replace() methodreturn str.replace(pattern, "");}// Given String strlet str = "GFGgfg123$%";// Print the strings after the simultaneous// modificationsconsole.log("After removing uppercase characters: " + removingUpperCaseCharacters(str)+"<br>" );console.log("After removing lowercase characters: " + removingLowerCaseCharacters(str)+"<br>" );console.log("After removing special characters: " + removingSpecialCharacters(str)+"<br>" );console.log("After removing numeric characters: " + removingNumericCharacters(str)+"<br>" );console.log("After removing non-numeric characters: "+ removingNonNumericCharacters(str)+"<br>" ); // This article is contributed by Pushpesh Raj |
Output
After removing uppercase characters: gfg123$% After removing lowercase characters: GFG123$% After removing special characters: GFGgfg123 After removing numeric characters: GFGgfg$% After removing non-numeric characters: 123
Time Complexity: O(N)
Auxiliary Space: O(1)
