input: 
  import matplotlib.pyplot as plt
  
  def visualize_top_languages():
      """
      Visualizes the top 5 most popular programming languages using Matplotlib. 
      The x-axis represents the languages and the y-axis represents the percentage of use.
      Example:
      >>> visualize_top_languages()
      (Displays a bar chart titled 'Popular Programming Languages', with an x-axis labeled 'Languages' 
      and a y-axis labeled 'Percentage of Use' showing the languages Python, Java, C++, Javascript, and C#.)
      """
      x_values = ["Python", "Java", "C++", "Javascript", "C#"]
      y_values = [45, 25, 15, 10, 5]
  
      plt.bar(x_values, y_values)
  
      plt.title("Popular Programming Languages")
      plt.ylabel("Percentage of Use")
      plt.xlabel("Languages")
  
      plt.show()
  
output:     plt.bar(x_values, y_values)
  
      plt.title("Popular Programming Languages")
      plt.ylabel("Percentage of Use")
      plt.xlabel("Languages")
  
      plt.show()