More Problems

• Write a program to check if a string is a valid hex color code using regex.
• Write a program to find the total number of characters in a string using a function.
• Write a program to implement a simple online book store with inventory management.
• Write a program to check if a number is a palindromic number using recursion.
• Write a program to find the sum of the first n triangular numbers.
• Write a program to implement a simple file backup system.
• Write a program to check if two strings are isomorphic.
• Write a program to find the longest palindromic prefix in a string.