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++ 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 Code int 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 program to validate the // PAN Card number using Regular Expression import 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 program to validate the # PAN Card number using Regular # Expression import 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# program to validate the // PAN Card numbe //using Regular Expressions using 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}$" ;
Regex re = new Regex(strRegex);
if (re.IsMatch(str))
return ( true );
else
return ( false );
}
} // This code is contributed by Rahul Chauhan |
// Javascript program to validate // PAN Number using Regular Expression // Function to validate the // PAN Number function isValidPanCardNo(panCardNo) {
// Regex to check valid
// PAN Number
let regex = new RegExp(/^[A-Z]{5}[0-9]{4}[A-Z]{1}$/);
// 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 |
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)