Given a string str, the task is to validate if this string represents an Indian vehicle number.
A Number Plate consists of three parts :
General Indian Vehicle Number Plate
Where,
UP: First two Characters denote the State Name. Basically, Initial Characters of a State is used i.e. If the vehicle is from Uttar Pradesh then,
UP Will denote the State Name.50:Next Two Numbers indicate District’s Sequential Number.
BY 1998:Next 6 (it varies from 5 to 6) letters are Unique alphanumeric string for each vehicle.
Examples:
Input: str = ”MH 05 S 9954?
Output: True
Explanation: MH – State Name
05 – District Sequential Number
S 9954 – Alphanumeric Unique CodeInput: str = ”MH 05 DL 9023 ”
Output: TrueInput: str = ”123@3459?
Output: False
Explanation: It has a unique character that is against the property of the Vehicle Number Plate code.Input: str =”9345268?
Output: False
Explanation: As Contains Number Only
Approach: The problem can be solved based on the following idea:
This problem can be dealt with regular expression. Regex will validate the entered data and will provide the exact format:
Create a regex pattern to validate the number as written below:
regex=”^[A-Z]{2}[\\ -]{0, 1}[0-9]{2}[\\ -]{0, 1}[A-Z]{1, 2}[\\ -]{0, 1}[0-9]{4}$” where^: Beginning of the String
[A-Z]: Character Set, matches a character in the range “A” to “Z”
{2}: Quantifier, Match of the two preceding items
[\\ -]{0, 1} : Matches one preceding item, It can be either space(\\) or Hyphen(-)
[0-9]{2}: Matches two preceding items, Both the item should be in the range 0 to 9
[A-Z]{1, 2}: It will match between 1 to 2, Item should be in the range “A” to “Z”
$: end of the String
Follow the steps mentioned below to implement the idea:
- Create a regex as shown above.
- Match the input string with the regex pattern.
- If the string matches the pattern then it is a valid number. Otherwise, it is not a valid number.
Below is the Code implementation of the above approach:
C++
// C++ program to validate// Indian Vehicle Number Plate using Regular Expression#include <bits/stdc++.h>#include <regex>using namespace std;// Function to validate the// Indian Vehicle Number Platestring isValidVehicleNumberPlate(string NUMBERPLATE){ // Regex to check valid // Indian Vehicle Number Plate const regex pattern( "^[A-Z]{2}[\\ -]{0,1}[0-9]{2}[\\ " "-]{0,1}[A-Z]{1,2}[\\ -]{0,1}[0-9]{4}$"); // Indian Vehicle Number Plate // is empty return false if (NUMBERPLATE.empty()) { return "false"; } // Return true if the NUMBERPLATE // matched the ReGex if (regex_match(NUMBERPLATE, pattern)) { return "true"; } else { return "false"; }}// Driver Codeint main(){ // Test Case 1: string str1 = "UP 50 BY 1998"; cout << isValidVehicleNumberPlate(str1) << endl; // Test Case 2: string str2 = "MH-05-DL-9023"; cout << isValidVehicleNumberPlate(str2) << endl; // Test Case 3: string str3 = "BNZAA2318JM"; cout << isValidVehicleNumberPlate(str3) << endl; // Test Case 4: string str4 = "MH 05 S 9954"; cout << isValidVehicleNumberPlate(str4) << endl; // Test Case 5: string str5 = "934517865"; cout << isValidVehicleNumberPlate(str5) << endl; // Test Case 6: string str6 = "MH05DL9023"; cout << isValidVehicleNumberPlate(str6) << endl; return 0;}// This code is contributed by Aman Kumar. |
Java
// Java program to validate// Indian Vehicle Number Plate using Regular Expressionimport java.util.regex.*;class GFG { // Function to validate the // Indian Vehicle Number Plate (For India Country Only) public static boolean isValidVehicleNumberPlate(String NUMBERPLATE) { // Regex to check valid Indian Vehicle Number Plate String regex = "^[A-Z]{2}[\\ -]{0,1}[0-9]{2}[\\ -]{0,1}[A-Z]{1,2}[\\ -]{0,1}[0-9]{4}$"; // Compile the ReGex Pattern p = Pattern.compile(regex); // If the Indian Vehicle Number Plate // is empty return false if (NUMBERPLATE == null) { return false; } // Pattern class contains matcher() method // to find matching between given // Indian Vehicle Number Plate Validation using // regular expression. Matcher m = p.matcher(NUMBERPLATE); // Return if the Indian Vehicle Number Plate // matched the ReGex return m.matches(); } // Driver Code. public static void main(String args[]) { // Test Case 1: String str1 = "UP 50 BY 1998"; System.out.println(isValidVehicleNumberPlate(str1)); // Test Case 2: String str2 = "MH-05-DL-9023"; System.out.println(isValidVehicleNumberPlate(str2)); // Test Case 3: String str3 = "BNZAA2318JM"; System.out.println(isValidVehicleNumberPlate(str3)); // Test Case 4: String str4 = "MH 05 S 9954"; System.out.println(isValidVehicleNumberPlate(str4)); // Test Case 5: String str5 = "934517865"; System.out.println(isValidVehicleNumberPlate(str5)); // Test Case 6: String str6 = "MH05DL9023"; System.out.println(isValidVehicleNumberPlate(str6)); }} |
Python3
# Python3 program to validate# Indian Vehicle Number Plate using Regular Expressionimport re# Function to validate# Indian Vehicle Number Platedef isValidVehicleNumberPlate(str): # Regex to check valid Indian Vehicle Number Plate regex = "^[A-Z]{2}[\\s-]{0,1}[0-9]{2}[\\s-]{0,1}[A-Z]{1,2}[\\s-]{0,1}[0-9]{4}$" # 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# Test Case 1:str1 = "UP 50 BY 1998"print(isValidVehicleNumberPlate(str1))# Test Case 2:str2 = "MH-05-DL-9023"print(isValidVehicleNumberPlate(str2))# Test Case 3:str3 = "BNZAA2318JM"print(isValidVehicleNumberPlate(str3))# Test Case 4:str4 = "MH 05 S 9954"print(isValidVehicleNumberPlate(str4))# Test Case 5:str5 = "934517865"print(isValidVehicleNumberPlate(str5))# Test Case 6:str6 = "MH05DL9023"print(isValidVehicleNumberPlate(str6)) |
C#
// C# program to validate// Indian Vehicle Number Plate using Regular Expressionusing System;using System.Text.RegularExpressions;class GFG { // Function to validate the // Indian Vehicle Number Plate (For India Country Only) public static bool isValidVehicleNumberPlate(String NUMBERPLATE) { // Regex to check valid Indian Vehicle Number Plate string regex = "^[A-Z]{2}[\\ -]{0,1}[0-9]{2}[\\ -]{0,1}[A-Z]{1,2}[\\ -]{0,1}[0-9]{4}$"; // Compile the ReGex Regex p = new Regex(regex); // If the Indian Vehicle Number Plate // is empty return false if (NUMBERPLATE == null) { return false; } // Pattern class contains matcher() method // to find matching between given // Indian Vehicle Number Plate Validation using // regular expression. Match m = p.Match(NUMBERPLATE); // Return if the Indian Vehicle Number Plate // matched the ReGex return m.Success; } // Driver Code. public static void Main() { // Test Case 1: string str1 = "UP 50 BY 1998"; Console.WriteLine(isValidVehicleNumberPlate(str1)); // Test Case 2: string str2 = "MH-05-DL-9023"; Console.WriteLine(isValidVehicleNumberPlate(str2)); // Test Case 3: string str3 = "BNZAA2318JM"; Console.WriteLine(isValidVehicleNumberPlate(str3)); // Test Case 4: string str4 = "MH 05 S 9954"; Console.WriteLine(isValidVehicleNumberPlate(str4)); // Test Case 5: string str5 = "934517865"; Console.WriteLine(isValidVehicleNumberPlate(str5)); // Test Case 6: string str6 = "MH05DL9023"; Console.WriteLine(isValidVehicleNumberPlate(str6)); }}// This code is contributed by Vaibhav nandan |
Javascript
// Javascript program to validate// Indian Vehicle Number Plate using Regular Expression// Function to validate the// Indian Vehicle Number Platefunction isValidVehicleNumberPlate(NUMBERPLATE) { // Regex to check valid // Indian Vehicle Number Plate let regex = new RegExp(/^[A-Z]{2}[ -][0-9]{1,2}(?: [A-Z])?(?: [A-Z]*)? [0-9]{4}$/); // Indian Vehicle Number Plate // is empty return false if (NUMBERPLATE == null) { return "false"; } // Return true if the NUMBERPLATE // matched the ReGex if (regex.test(NUMBERPLATE) == true) { return "true"; } else { return "false"; }}// Driver Code// Test Case 1:let str1 = "UP 50 BY 1998";console.log(isValidVehicleNumberPlate(str1));// Test Case 2:let str2 = "MH 05 DL 9023";console.log(isValidVehicleNumberPlate(str2));// Test Case 3:let str3 = "BNZAA2318JM";console.log(isValidVehicleNumberPlate(str3));// Test Case 4:let str4 = "MH 05 S 9954";console.log(isValidVehicleNumberPlate(str4));// Test Case 5:let str5 = "934517865";console.log(isValidVehicleNumberPlate(str5));// Test Case 6:let str6 = "MH 05 DL 9023";console.log(isValidVehicleNumberPlate(str6));// This code is contributed by akashish__ |
true true false true false true
Time Complexity: O(N) where N is the length of the string
Auxiliary Space: O(1)
Ready to dive in? Explore our Free Demo Content and join our DSA course, trusted by over 100,000 neveropen!
