Given string str of alphanumeric characters, the task is to check whether the string is a valid PAN (Permanent Account Number) Card number or not by using Regular Expression.
The valid PAN Card number must satisfy the following conditions:
- It should be ten characters long.
- The first five characters should be any upper case alphabets.
- The next four-characters should be any number from 0 to 9.
- The last(tenth) character should be any upper case alphabet.
- It should not contain any white spaces.
Examples:
Input: str = “BNZAA2318J”
Output: true
Explanation:
The given string satisfies all the above mentioned conditions.Input: str = “23ZAABN18J”
Output: false
Explanation:
The given string not starts with upper case alphabets, therefore it is not a valid PAN Card number.Input: str = “BNZAA2318JM”
Output: false
Explanation:
The given string contains eleven characters, therefore it is not a valid PAN Card number.Input: str = “BNZAA23184”
Output: true
Explanation:
The last(tenth) character of this string is a numeric(0-9) character, therefore it is not a valid PAN Card number.Input: str = “BNZAA 23184”
Output: true
Explanation:
The given string contains white spaces, therefore it is not a valid PAN Card number.
Approach: This problem can be solved by using Regular Expression.
- Get the string.
- Create a regular expression to validate the PAN Card number as mentioned below:
regex = "[A-Z]{5}[0-9]{4}[A-Z]{1}";
- Where:
- [A-Z]{5} represents the first five upper case alphabets which can be A to Z.
- [0-9]{4} represents the four numbers which can be 0-9.
- [A-Z]{1} represents the one upper case alphabet which can be A to Z.
- Match the given string with the regex, in Java, this can be done using Pattern.matcher().
- Return true if the string matches with the given regex, else return false.
Below is the implementation of the above approach:
C++
// C++ program to validate the// PAN Card number using Regular // Expression#include <iostream>#include <regex>using namespace std;// Function to validate the // PAN Card number.bool isValidPanCardNo(string panCardNo){ // Regex to check valid // PAN Card number. const regex pattern("[A-Z]{5}[0-9]{4}[A-Z]{1}"); // If the PAN Card number // is empty return false if (panCardNo.empty()) { return false; } // Return true if the PAN Card number // matched the ReGex if (regex_match(panCardNo, pattern)) { return true; } else { return false; }}// Driver Codeint main(){ // Test Case 1: string str1 = "BNZAA2318J"; cout << isValidPanCardNo(str1) << endl; // Test Case 2: string str2 = "23ZAABN18J"; cout << isValidPanCardNo(str2) << endl; // Test Case 3: string str3 = "BNZAA2318JM"; cout << isValidPanCardNo(str3) << endl; // Test Case 4: string str4 = "BNZAA23184"; cout << isValidPanCardNo(str4) << endl; // Test Case 5: string str5 = "BNZAA 23184"; cout << isValidPanCardNo(str5) << endl; return 0;}// This code is contributed by yuvraj_chandra |
Java
// Java program to validate the// PAN Card number using Regular Expressionimport java.util.regex.*;class GFG{ // Function to validate the PAN Card number. public static boolean isValidPanCardNo(String panCardNo) { // Regex to check valid PAN Card number. String regex = "[A-Z]{5}[0-9]{4}[A-Z]{1}"; // Compile the ReGex Pattern p = Pattern.compile(regex); // If the PAN Card number // is empty return false if (panCardNo == null) { return false; } // Pattern class contains matcher() method // to find matching between given // PAN Card number using regular expression. Matcher m = p.matcher(panCardNo); // Return if the PAN Card number // matched the ReGex return m.matches(); } // Driver Code. public static void main(String args[]) { // Test Case 1: String str1 = "BNZAA2318J"; System.out.println(isValidPanCardNo(str1)); // Test Case 2: String str2 = "23ZAABN18J"; System.out.println(isValidPanCardNo(str2)); // Test Case 3: String str3 = "BNZAA2318JM"; System.out.println(isValidPanCardNo(str3)); // Test Case 4: String str4 = "BNZAA23184"; System.out.println(isValidPanCardNo(str4)); // Test Case 5: String str5 = "BNZAA 23184"; System.out.println(isValidPanCardNo(str5)); }} |
Python3
# Python3 program to validate the# PAN Card number using Regular# Expressionimport re# Function to validate the# PAN Card number.def isValidPanCardNo(panCardNo): # Regex to check valid # PAN Card number regex = "[A-Z]{5}[0-9]{4}[A-Z]{1}" # Compile the ReGex p = re.compile(regex) # If the PAN Card number # is empty return false if(panCardNo == None): return False # Return if the PAN Card number # matched the ReGex if(re.search(p, panCardNo) and len(panCardNo) == 10): return True else: return False# Driver Code.# Test Case 1:str1 = "BNZAA2318J"print(isValidPanCardNo(str1))# Test Case 2:str2 = "23ZAABN18J"print(isValidPanCardNo(str2))# Test Case 3:str3 = "BNZAA2318JM"print(isValidPanCardNo(str3))# Test Case 4:str4 = "BNZAA23184"print(isValidPanCardNo(str4))# Test Case 5:str5 = "BNZAA 23184"print(isValidPanCardNo(str5))# This code is contributed by avanitrachhadiya2155 |
C#
// C# program to validate the// PAN Card numbe//using Regular Expressionsusing System;using System.Text.RegularExpressions;class GFG{ // Main Method static void Main(string[] args) { // Input strings to Match // PAN Card numbe string[] str={"BNZAA2318J","23ZAABN18J","BNZAA2318JM","BNZAA23184","BNZAA 23184"}; foreach(string s in str) { Console.WriteLine( isValidPanCardNo(s) ? "true" : "false"); } Console.ReadKey(); } // method containing the regex public static bool isValidPanCardNo(string str) { string strRegex = @"[A-Z]{5}[0-9]{4}[A-Z]{1}$"; Regex re = new Regex(strRegex); if (re.IsMatch(str)) return (true); else return (false); }}// This code is contributed by Rahul Chauhan |
Javascript
// Javascript program to validate// PAN Number using Regular Expression// Function to validate the// PAN Number function isValidPanCardNo(panCardNo) { // Regex to check valid // PAN Number let regex = new RegExp(/^[A-Z]{5}[0-9]{4}[A-Z]{1}$/); // if PAN Number // is empty return false if (panCardNo == null) { return "false"; } // Return true if the PAN NUMBER // matched the ReGex if (regex.test(panCardNo) == true) { return "true"; } else { return "false"; }}// Driver Code// Test Case 1:let str1 = "BOSPC9911H";console.log(isValidPanCardNo(str1));// Test Case 2:let str2 = "23ZAABN18J";console.log(isValidPanCardNo(str2));// Test Case 3:let str3 = "BNZAA2318JM";console.log(isValidPanCardNo(str3));// Test Case 4:let str4 = "BNZAA23184";console.log(isValidPanCardNo(str4));// Test Case 5:let str5 = "BNZAA 23184";console.log(isValidPanCardNo(str5));// This code is contributed by Rahul Chauhan |
Output
true false false false false
Time Complexity: O(N) for each testcase, where N is the length of the given string.
Auxiliary Space: O(1)
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