What does 20 in x variable does while getting random number?

import pandas as pd import numpy as np import matplotlib.pyplot as plt

plotting histogram with random numbers

x=20 * np.random.randn(1020)

plt.hist(x,90, range= (-50,50),alpha=1,histtype='stepfilled',align='mid', color='deepskyblue',label='Test_Data',edgecolor='black');histogram

plt.legend()legend plt.title("Random data Histogram")title plt.show() show