More Problems

• Write a program to check if a string is a valid username.
• Write a program to find the average of elements in an array using a function.
• Write a program to check if a number is a twin prime.
• Write a program to find the sum of the digits of a hexadecimal number.
• Write a program to convert a binary number to its decimal equivalent.
• Write a program to implement a basic student record management system.
• Write a program to check if a number is an abundant number using a function.
• Write a program to calculate the sum of the first n odd integers.