import numpy as np

arr = np.arange(10,51,3)
print("arr is:",arr)
print("arr is:",type(arr))
print("arr is:",arr)
print("arr is:",arr)

print()
arr2D = np.array(([[1,2,3],[4,5,6],[7,8,9]]))
print(arr2D[0:2,0:2])
#print(arr2D[0:2,0:2, 0:2])
print(arr2D[0:2])
print(">>>>>><<<<<<<")
