how to set title on matplotlib code example

Example 1: matplotlib title

import matplotlib.pyplot as plt

plt.title('TITLE')

Example 2: matplotlib title inside plot

import matplotlib. pyplot as plt
A= [2,1,4,5]; B = [3,2,-2,1]
plt.scatter(A,B)
plt.title("title", x=0.9, y=0.9)
plt.xlabel("x-axis")
plt.ylabel("y-axis")
plt.show()