More Problems

• Write a program to check if a string is a valid hexadecimal color code.
• Write a program to find the largest prime factor of a number.
• Write a program to convert a string to an integer.
• Write a program to implement a simple unit converter (e.g., meters to feet).
• Write a program to count the number of lines in a text file.
• Write a program to implement a basic URL shortener.
• Write a program to check if a number is a narcissistic number.
• Write a program to print a pyramid of numbers.