import numpy as np  # vecterop1.py

aa = np.array(range(1, 11))
bb = np.array(range(1, 6))
cc = np.array([1,2,1,2,1])
print(bb + cc)
# aa + bb # 에러
aa * 3
bb ** 2 # np.power(bb, 2) 와 같음