Value constructor: Creating a 5x5 matrix 
0.0
4.0
[[ 0.  0.  0.  0.  0.]
 [ 0.  0.  0.  0.  0.]
 [ 0.  0.  0.  4.  0.]
 [ 0.  0.  0.  0.  0.]
 [ 0.  0.  0.  0.  0.]]
4.0
5.0
Freeing a 5x5 matrix