Given some UPI IDs, the task is to check if they are valid or not using regular expressions. Rules for the valid UPI ID:
- UPI ID is an alphanumeric String i.e., formed using digits(0-9), alphabets (A-Z and a-z), and other special characters.
- It must contain ‘@’.
- It should not contain whitespace.
- It may or may not contain a dot (.) or hyphen (-).
UPI stands for Unified Payments Interface (UPI).UPI IDs are unique IDs given to each customer.
Examples :
Input: str = ”9136812895@ybl?
Output: TrueInput: str = ”MH05DL9023 ”
Output: false
Explanation: It does not contain the “@” symbol.Input: str = ”ViratKohli101@paytm?
Output: trueInput: str =”rahul.12chauhan1998-1@okicici?
Output: trueInput: str = ”1234567890@upi123456?
Output: trueInput: str = ”Akanksha @ybl ”
Output: false
Explanation: It contains a whitespace.
Approach: The problem can be solved based on the following idea:
Create a regex pattern to validate the number as written below:
regex=”^[a-zA-Z0-9.-]{2, 256}@[a-zA-Z][a-zA-Z]{2, 64}$”^ : Beginning of the string.
[] Character set :Match any character in the set.
[a-zA-Z0-9.-] : Match any character in the range a-z, A-Z, 0-9, hyphen(-), dot(.).
{2, 256} Quantifier: Match between 2 and 256 of the preceding items.
$: End of the string
Follow the below steps to implement the idea:
- Create regex expression for UPI ID.
- Use Pattern class to compile the regex formed.
- Use the matcher function to check whether the UPI id is valid or not.
- If it is valid, return true. Otherwise, return false.
Below is the implementation of the above approach.
// C++ program to validate the // UPI ID using Regular // Expression #include <bits/stdc++.h> #include <regex> using namespace std;
// Function to validate the // upi_Id Code string isValidUpi(string upi_Id) { // Regex to check valid upi_Id Code
const regex pattern(
"^[a-zA-Z0-9.-]{2, 256}@[a-zA-Z][a-zA-Z]{2, 64}$" );
// If the upi_Id Code
// is empty return false
if (upi_Id.empty()) {
return "false" ;
}
// Return true if the upi_Id Code
// matched the ReGex
if (regex_match(upi_Id, pattern)) {
return "true" ;
}
else {
return "false" ;
}
} // Driver Code int main()
{ // Test Case 1:
string str1 = "9136812895@ybl" ;
cout << isValidUpi(str1) << endl;
// Test Case 2:
string str2 = "rahul.12chauhan1998-1@okicici" ;
cout << isValidUpi(str2) << endl;
// Test Case 3:
string str3 = "BNZAA2318JM" ;
cout << isValidUpi(str3) << endl;
// Test Case 4:
string str4 = "934517865" ;
cout << isValidUpi(str4) << endl;
// Test Case 5:
string str5 = "ViratKohli101@paytm" ;
cout << isValidUpi(str5) << endl;
// Test Case 6:
string str6 = "Akanksha @ybl" ;
cout << isValidUpi(str6) << endl;
return 0;
} |
// Java program to validate the // UPI ID using Regular Expression import java.util.regex.*;
class GFG {
// Function to validate the
// UPI ID(For India Country Only)
public static boolean isValidUpi(String upi_Id)
{
// Regex to check valid upi_Id Code
String regex
= "^[a-zA-Z0-9.-]{2, 256}@[a-zA-Z][a-zA-Z]{2, 64}$" ;
// Compile the ReGex
Pattern p = Pattern.compile(regex);
// If the upi_Id Code
// is empty return false
if (upi_Id == null ) {
return false ;
}
// Pattern class contains matcher()
// method to find matching between
// given MICR Code using regex
Matcher m = p.matcher(upi_Id);
// Return if the upi_Id Code
// matched the ReGex
return m.matches();
}
// Driver Code.
public static void main(String args[])
{
// Test Case 1:
String str1 = "9136812895@ybl" ;
System.out.println(isValidUpi(str1));
// Test Case 2:
String str2 = "rahul.12chauhan1998-1@okicici" ;
System.out.println(isValidUpi(str2));
// Test Case 3:
String str3 = "BNZAA2318JM" ;
System.out.println(isValidUpi(str3));
// Test Case 4:
String str4 = "934517865" ;
System.out.println(isValidUpi(str4));
// Test Case 5:
String str5 = "ViratKohli101@paytm" ;
System.out.println(isValidUpi(str5));
// Test Case 6:
String str6 = "Akanksha @ybl" ;
System.out.println(isValidUpi(str6));
}
} |
# Python3 program to validate # UPI ID using Regular Expression import re
# Function to validate # UPI ID(For India Country Only) def isValidUpi( str ):
# Regex to check valid UPI ID
regex = "^[a-zA-Z0-9.-]{2, 256}@[a-zA-Z][a-zA-Z]{2, 64}$"
# 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 = "9136812895@ybl"
print (isValidUpi(str1))
# Test Case 2:
str2 = "rahul.12chauhan1998-1@okicici"
print (isValidUpi(str2))
# Test Case 3:
str3 = "Rahul 1998"
print (isValidUpi(str3))
# Test Case 4:
str4 = "934517865"
print (isValidUpi(str4))
# Test Case 5:
str5 = "ViratKohli101@paytm"
print (isValidUpi(str5))
# Test Case 6:
str6 = "Akanksha @ybl"
print (isValidUpi(str6))
|
// C# program to validate the // UPI ID using Regular Expression using System;
using System.Text.RegularExpressions;
public class GFG
{ // Function to validate the
// UPI ID(For India Country Only)
public static bool isValidUpi( string upi_Id)
{
// Regex to check valid upi_Id Code
string regex
= "^[a-zA-Z0-9.-]{2, 256}@[a-zA-Z][a-zA-Z]{2, 64}$" ;
// Compile the ReGex
Regex p = new Regex(regex);
// If the upi_Id Code
// is empty return false
if (upi_Id == null ) {
return false ;
}
// Pattern class contains matcher()
// method to find matching between
// given MICR Code using regex
Match m = p.Match(upi_Id);
// Return if the upi_Id Code
// matched the ReGex
return m.Success;
}
// Driver Code.
public static void Main()
{
// Test Case 1:
string str1 = "9136812895@ybl" ;
Console.WriteLine(isValidUpi(str1));
// Test Case 2:
string str2 = "rahul.12chauhan1998-1@okicici" ;
Console.WriteLine(isValidUpi(str2));
// Test Case 3:
string str3 = "BNZAA2318JM" ;
Console.WriteLine(isValidUpi(str3));
// Test Case 4:
string str4 = "934517865" ;
Console.WriteLine(isValidUpi(str4));
// Test Case 5:
string str5 = "ViratKohli101@paytm" ;
Console.WriteLine(isValidUpi(str5));
// Test Case 6:
string str6 = "Akanksha @ybl" ;
Console.WriteLine(isValidUpi(str6));
}
} // This code is contributed by Pushpesh Raj. |
// Javascript program to validate // UPI ID using Regular Expression // Function to validate the // upi_Id Code function isValid_UPI_ID(upi_Id) {
// Regex to check valid
// upi_Id
let regex = new RegExp(/^[a-zA-Z0-9.-]{2, 256}@[a-zA-Z][a-zA-Z]{2, 64}$/);
// upi_Id
// is empty return false
if (upi_Id == null ) {
return "false" ;
}
// Return true if the upi_Id
// matched the ReGex
if (regex.test(upi_Id) == true ) {
return "true" ;
}
else {
return "false" ;
}
} // Driver Code // Test Case 1: let str1 = "9136812895@ybl" ;
console.log(isValid_UPI_ID(str1)); // Test Case 2: let str2 = "rahul.12chauhan1998-1@okicici" ;
console.log(isValid_UPI_ID(str2)); // Test Case 3: let str3 = "BNZAA2318JM" ;
console.log(isValid_UPI_ID(str3)); // Test Case 4: let str4 = "MH 05 S 9954" ;
console.log(isValid_UPI_ID(str4)); // Test Case 5: let str5 = "ViratKohli101@paytm" ;
console.log(isValid_UPI_ID(str5)); // Test Case 6: let str6 = "Akanksha @ybl" ;
console.log(isValid_UPI_ID(str6)); |
true true false false true false
Time Complexity: O(N) for each testcase, where N is the length of the given string.
Auxiliary Space: O(1)