More Problems

• Write a program to implement a basic online language learning platform.
• Write a program to check if a string is a valid IP address using regex.
• Write a program to find the first non-repeating character in a string using a function.
• Write a program to implement a basic online job application system.
• Write a program to check if a number is an automorphic number using a function.
• Write a program to find the sum of all prime numbers up to a given limit.
• Write a program to implement a basic online coding challenge platform.
• Write a program to check if a string is a valid hexadecimal number.