Given some Corporate Identification Number, the task is to check if they are valid or not using regular expressions. Rules for the valid CIN are:
- CIN is a 21 digits alpha-numeric code.
- It starts with either alphabet letter U or L.
- Next five characters are reserved for digits (0-9).
- Next two places are occupied by alphabet letters(A-Z-a-z).
- Next four places are taken by digits(0-9).
- Next three characters are reserved for alphabet letters (A-Za-z).
- Next six characters are digits(0-9).
- It should not contain any special character or whitespaces.
Examples:
Input: str= ”U12345AB6784CDE123456”
Output: True
Explanation: It is matching with the above mentioned points.Input: str= ”R12345AB6784CDE123456”
Output: False
Explanation: A CIN number must start with U or L.Input: str= ”U12345AB6784CDE1234”
Output: False
Explanation: Its length should be equal to 21.
Approach: The problem can be solved based on the following idea:
Create a regex pattern to validate the number as written below:
regex= “^([LUu]{1})([0-9]{5})([A-Za-z]{2})([0-9]{4})([A-Za-z]{3})([0-9]{6})$“
Where,
^ : Start of the string
[LUu]{1} : This pattern will match one of the preceding item if it is either U, u or L.
[0-9]{5} : This pattern will match five of the preceding items if it is a digit(0-9).
[A-Z-a-z]{2}: This pattern will match two of the preceding items if it in the range “A” to “Z” OR “a” to “z”.
$ : End of the String.
Follow the below steps to implement the idea:
- Create a regex expression for Corporate Identification Number.
- Use Pattern class to compile the regex formed.
- Use the matcher function to check whether the CIN is valid or not.
- If it is valid, return true. Otherwise, return false.
Below is the code implementation of the above approach:-
C++
// C++ program to validate the // Corporate Identification Number (CIN) // using Regular Expression #include <bits/stdc++.h> #include <regex> using namespace std; // Function to validate the // Corporate Identification Number (CIN) string isValid_CIN_Number(string str) { // Regex to check valid // CIN Number const regex pattern( "([LUu]{1})([0-9]{5})([A-Za-z]{2})([0-9]{4})([A-Za-" "z]{3})([0-9]{6})$" ); // If the str is empty return false if (str.empty()) { return "false" ; } // Return true if the str // matched the ReGex if (regex_match(str, pattern)) { return "true" ; } else { return "false" ; } } // Driver Code int main() { // Test Case 1: string str1 = "U12345AB6784CDE123456" ; cout << isValid_CIN_Number(str1) << endl; // Test Case 2: string str2 = "L12345AB6784CDE123456" ; cout << isValid_CIN_Number(str2) << endl; // Test Case 3: string str3 = "u12345AB6784CDE123456" ; cout << isValid_CIN_Number(str3) << endl; // Test Case 4: string str4 = "L12345@&^6784CDE123456" ; cout << isValid_CIN_Number(str4) << endl; // Test Case 5: string str5 = "U12345AB6784CDE1234" ; cout << isValid_CIN_Number(str5) << endl; return 0; } |
Java
// Java program to validate the // Corporate Identification Number (CIN) // using Regular Expression import java.util.regex.*; class GFG { // Function to validate the // Corporate Identification Number (CIN) public static boolean isValid_CIN_Number(String str) { // Regex to check valid CIN Number String regex = "^([LUu]{1})([0-9]{5})([A-Za-z]{2})([0-9]{4})([A-Za-z]{3})([0-9]{6})$" ; // Compile the ReGex Pattern p = Pattern.compile(regex); // If the str // is empty return false if (str == null ) { return false ; } // Pattern class contains matcher() // methodto find matching between // given str using regex. Matcher m = p.matcher(str); // Return if the str // matched the ReGex return m.matches(); } // Driver Code. public static void main(String args[]) { // Test Case 1: String str1 = "U12345AB6784CDE123456" ; System.out.println(isValid_CIN_Number(str1)); // Test Case 2: String str2 = "L12345AB6784CDE123456" ; System.out.println(isValid_CIN_Number(str2)); // Test Case 3: String str3 = "u12345AB6784CDE123456" ; System.out.println(isValid_CIN_Number(str3)); // Test Case 4: String str4 = "L12345@&^6784CDE123456" ; System.out.println(isValid_CIN_Number(str4)); // Test Case 5: String str5 = "U12345AB6784CDE1234" ; System.out.println(isValid_CIN_Number(str5)); } } |
Python3
# Python3 program to validate # Corporate Identification Number (CIN) # using Regular Expression import re # Function to validate # Corporate Identification Number (CIN) def isValid_CIN_Number( str ): # Regex to check valid CIN Number regex = "([LUu]{1})([0-9]{5})([A-Za-z]{2})([0-9]{4})([A-Za-z]{3})([0-9]{6})$" # Compile the ReGex p = re. compile (regex) # If the string is empty # return false if ( str = = None ): return "false" # Return if the string # matched the ReGex if (re.search(p, str )): return "true" else : return "false" # Driver code if __name__ = = '__main__' : # Test Case 1: str1 = "U12345AB6784CDE123456" print (isValid_CIN_Number(str1)) # Test Case 2: str2 = "L12345AB6784CDE123456" print (isValid_CIN_Number(str2)) # Test Case 3: str3 = "U12345AB6784CDE123456" print (isValid_CIN_Number(str3)) # Test Case 4: str4 = "L12345@&^6784CDE123456" print (isValid_CIN_Number(str4)) # Test Case 5: str5 = "U12345AB6784CDE1234" print (isValid_CIN_Number(str5)) |
C#
// C# program to validate the // Corporate Identification Number (CIN) // using Regular Expression using System; using System.Text.RegularExpressions; public class GFG { // Function to validate the // Corporate Identification Number (CIN) public static bool isValid_CIN_Number( string str) { // Regex to check valid CIN Number string regex = "^([LUu]{1})([0-9]{5})([A-Za-z]{2})([0-9]{4})([A-Za-z]{3})([0-9]{6})$" ; // Compile the ReGex Regex p = new Regex(regex); // If the str // is empty return false if (str == null ) { return false ; } // Pattern class contains matcher() // methodto find matching between // given str using regex. Match m = p.Match(str); // Return if the str // matched the ReGex return m.Success; } // Driver Code. public static void Main() { // Test Case 1: string str1 = "U12345AB6784CDE123456" ; Console.WriteLine(isValid_CIN_Number(str1)); // Test Case 2: string str2 = "L12345AB6784CDE123456" ; Console.WriteLine(isValid_CIN_Number(str2)); // Test Case 3: string str3 = "u12345AB6784CDE123456" ; Console.WriteLine(isValid_CIN_Number(str3)); // Test Case 4: string str4 = "L12345@&^6784CDE123456" ; Console.WriteLine(isValid_CIN_Number(str4)); // Test Case 5: string str5 = "U12345AB6784CDE1234" ; Console.WriteLine(isValid_CIN_Number(str5)); } } // This code is contributed by Pushpesh Raj. |
Javascript
// Javascript program to validate // Corporate Identification Number (CIN) using Regular Expression // Function to validate the // Corporate Identification Number (CIN) function isValid_CIN_Number(str) { // Regex to check valid // CIN Number let regex = new RegExp(/^([LUu]{1})([0-9]{5})([A-Za-z]{2})([0-9]{4})([A-Za-z]{3})([0-9]{6})$/); //if str // is empty return false if (str == null ) { return "false" ; } // Return true if the str // matched the ReGex if (regex.test(str) == true ) { return "true" ; } else { return "false" ; } } // Driver Code // Test Case 1: let str1 = "U12345AB6784CDE123456" ; console.log(isValid_CIN_Number(str1)); // Test Case 2: let str2 = "L12345AB6784CDE123456" ; console.log(isValid_CIN_Number(str2)); // Test Case 3: let str3 = "u12345AB6784CDE123456" ; console.log(isValid_CIN_Number(str3)); // Test Case 4: let str4 = "L12345@&^6784CDE123456" ; console.log(isValid_CIN_Number(str4)); // Test Case 5: let str5 = "U12345AB6784CDE1234" ; console.log(isValid_CIN_Number(str5)); |
true true true false false
Time Complexity : O(1)
Space Complexity : O(1)
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