More Problems

• Write a program to calculate the sum of the first n odd numbers.
• Write a program to check if a number is a happy number.
• Write a program to print a diamond pattern using stars.
• Write a program to calculate the number of days between two dates.
• Write a program to convert decimal to binary.
• Write a program to display all the prime factors of a number.
• Write a program to implement a simple string encryption algorithm.
• Write a program to count the number of times a substring appears in a string.