More Problems

• Implement a function to find the number of distinct characters in a string.
• Create a program to calculate the product of all digits in a number.
• Write a program to check if a number is a pronic number.
• Implement a function to calculate the perimeter of a rectangle given its dimensions.
• Create a program to determine if a string contains only digits.
• Write a program to check if a number is a Keith number.
• Implement a function to find the number of divisors of a number.
• Create a program to calculate the sum of numbers from 1 to n using recursion.