# get number of rows in 2D numpy array.
numOfRows = np. size(arr2D, 0)
# get number of columns in 2D numpy array.
numOfColumns = np. size(arr2D, 1)
c = np.array([[1, 2, 3],[6, 5, 4]])
'''
c returns the following matrix
[1, 2, 3]
[4, 5, 6]
'''
print(c.shape)
#returns: (2,3) (number of rows, number of columns)