Last Updated: November 21, 2025
Creating Arrays
import numpy as np\n\narr = np.array([1,2,3])\nnp.zeros((3,4))\nnp.ones((2,3))Operations
np.sum(arr)
Sum
np.mean(arr)
Mean
np.std(arr)
Std dev
💡 Pro Tip:
NumPy is vectorized and fast!