Numpy ndarray.dot() function | Python

numpy.ndarray.dot() function return the dot product of two arrays.

Syntax : numpy.ndarray.dot(arr, out=None)

Parameters :
arr : [array_like] Input array.
out : [ndarray, optional] Output argument.

Return : [ndarray] The dot product of two arrays.

Code #1 :

# Python program explaining
# numpy.ndarray.dot() function

# importing numpy as geek
import numpy as geek

arr1 = geek.eye(3)
arr = geek.ones((3, 3)) * 3

gfg = arr1.dot( arr )

print( gfg)

Output :

[[ 3.  3.  3.]
 [ 3.  3.  3.]
 [ 3.  3.  3.]]

Code #2 :

# Python program explaining
# numpy.ndarray.dot() function

# importing numpy as geek
import numpy as geek

arr1 = geek.eye(3)
arr = geek.ones((3, 3)) * 3

gfg = arr1.dot(arr).dot(arr)

print( gfg)

Output :

[[ 27.  27.  27.]
 [ 27.  27.  27.]
 [ 27.  27.  27.]]