def area_of_circle(r):
        area = 3.14 * r * r
        print(area)
    area_of_circle(5) # This line calls the function
                    
                

                    
    shopping = ["apples", "bread"]
    def delete_from_list(item):
        shopping.append(item)
        print(shopping)
    delete_from_list("ketchup")
                    
                

                
    shopping = ["apples", "bread", "ketchup"]
    def delete_from_list(item):
        shopping.pop(item)
        print(shopping)
    delete_from_list(0)                    
                
            

                
    count = 0
    def increment_counter():
        global count
        count += 1
    increment_counter()
    increment_counter()
    print(count)
                
            

                
    def linear_search(search_list, value):
        flag = False
        for index in range(0, len(search_list)):
            if search_list[index] == value:
            flag = True
            break
        if flag == True:
            print("item found in list")
        else:
            print("value not found")
    
    my_list = [3, 7, 1, 9, 2]
    target_value = 7
    linear_search(my_list, target_value)  
                
            

                
    def reverse_list(data):
        print(data.reverse())
    
    my_list = [1, 2, 3, 4, 5]
    reverse_list(my_list)                 
                
            

                
    def find_vowels(text):
        string = ""
        vowels = "aeiou"
        for char in text:
            if char.lower() in vowels:
            string += char
        print(string)
    
    find_vowels("Hello, World!")
                
            

                
    def display_progress_bar(progress):
        bar_length = 5
        completed = int(progress * bar_length)
        print(f'[{"#" * completed}{" " * (bar_length - completed)}] {str(int(progress * 100))}%')
    
    # Example usage
    for i in range(5):
        display_progress_bar(i/5)