More Problems

• Create a function to calculate the sum of two fractions.
• Write a program to generate all combinations of a string.
• Implement a program to check if a string is a valid identifier.
• Create a function to find the second largest number in an array.
• Create a program to find the sum of all even numbers in a given range.
• Write a function to count the number of prime numbers less than a given number.
• Implement a program to calculate the cube of a number.
• Create a function to find the nth Fibonacci number using an iterative approach.