# Dot and Cross in Python – HackerRank Solution

dotThe dot tool returns the dot product of two arrays.

```import numpy
A = numpy.array([ 1, 2 ])
B = numpy.array([ 3, 4 ])
print numpy.dot(A, B)       #Output : 11
```

CrossThe cross tool returns the cross product of two arrays.

```import numpy
A = numpy.array([ 1, 2 ])
B = numpy.array([ 3, 4 ])
print numpy.cross(A, B)     #Output : -2
```

You are given two arrays A and B. Both have dimensions of NXN.
Your task is to compute their matrix product.

#### Input Format :

The first line contains the integer N.
The next N lines contains N space separated integers of array A.The following N lines contains N space separated integers of array B.

#### Output Format :

Print the matrix multiplication of A and B.

```2
1 2
3 4
1 2
3 4
```

#### Sample Output :

```[[ 7 10]
[15 22]]```

### Dot and Cross in Python – HackerRank Solution

```import numpy
n = int(input())
a = numpy.array([input().split() for _ in range(n)], int)
b = numpy.array([input().split() for _ in range(n)], int)
print(numpy.dot(a, b))```

Disclaimer: The above Problem (Dot and Cross in Python ) is generated by Hackerrank but the Solution is Provided by Chase2Learn. This tutorial is only for Educational and Learning purposes. Authority if any of the queries regarding this post or website fill the following contact form thank you.