Write a Python program to find the largest number in a list of integers

Answers:

• Certainly! Below is a simple Python program that finds the largest number in a list of integers.

  def find_largest_number(numbers):
      # Check if the list is empty
      if not numbers:
          return None  # Return None if the list is empty
      
      # Initialize the largest number as the first element of the list
      largest_number = numbers[0]
      
      # Loop through each number in the list
      for number in numbers:
          # Update the largest number if the current number is greater
          if number > largest_number:
              largest_number = number
              
      return largest_number
  
  # Example usage
  if __name__ == "__main__":
      num_list = [10, 55, 23, 78, 34, 88, 99, 2]
      largest = find_largest_number(num_list)
      if largest is not None:
          print("The largest number in the list is:", largest)
      else:
          print("The list is empty.")
  

  Explanation:

  1. The find_largest_number function takes a list of numbers as input.
  2. It checks if the list is empty; if so, it returns None.
  3. It initializes a variable largest_number with the first element of the list.
  4. It then iterates through each number in the list and updates largest_number if the current number is greater.
  5. Finally, it returns the largest number found.

  Example Usage:

  You can call the program by placing a list of integers in num_list, and it will print the largest number. If the list is empty, it will inform you that the list is empty.

Related Questions:

• How can you modify the program to find the smallest number in a list of integers?
• What changes would you make to the program to handle a list of floating-point numbers instead?
• How can you extend the program to return both the largest and the smallest numbers in a list?