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Let us create the below function (`multiply_loops`

) which takes two arrays as input and computes their **multiplication using normal Python way**.

```
def multiply_loops(A, B):
c=np.zeros((A.shape[0], B.shape[1]))
for i in range(A.shape[0]):
for k in range(B.shape[1]):
c[i,k] = 0
for j in range(B.shape[0]):
n = A[i,j] * B[j,k]
c[i,k] += n
return c
```

Now, let us create the below function (`multiply_vector`

) which takes two arrays as input and computes their **multiplication using NumPy's vector multiplication way**.

```
def multiply_vector(A, B):
return A @ B
```

Let us create two randomly generated 100x100 matrices - `X`

and `Y`

- to test the above functions

```
X = np.random.random((100, 100))
Y = np.random.random((100, 100))
```

Now execute the below command (`timeit`

) in Jupyter, which will output you the time taken by each of these functions

```
%timeit multiply_loops(X, Y)
%timeit multiply_vector(X, Y)
```

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