a = np.array([1, 2, 3, 4, 5])
# Access individual elements
print(a[0]) # Output: 1
# Access subarrays
print(a[1:4]) # Output: [2 3 4]
b = np.array([[1, 2, 3], [4, 5, 6]])
# Access two-dimensional array elements
print(b[0, 1]) # Output: 2
# Access rows of two-dimensional arrays
print(b[0, :]) # Output: [1 2 3]
# Access columns of two-dimensional arrays
print(b[:, 1]) # Output: [2 5]
