Write a NumPy program to save a given array to a text file and load it

import numpy as np
import os
x = np.arange(12).reshape(4, 3)
print("Original array:")
print(x)
header = 'col1 col2 col3'
np.savetxt('temp.txt', x, fmt="%d", header=header) 
print("After loading, content of the text file:")
result = np.loadtxt('temp.txt')
print(result)