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# Numpy ndarray.dot() function | Python

• Last Updated : 22 Apr, 2020

`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.]]
```

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