CODE EXAMPLE FOR PYTHON

size of a NumPy array in Python

a = np.arange(3)
b = np.arange(12).reshape((3, 4))
c = np.arange(24).reshape((2, 3, 4))

# it returns the total number of elements
print(a.size) # 3
print(b.size) # 12
print(c.size) # 24