Read Size and Construct Numpy array object

Constructing one dimensional array :

• ndarray() is pre-defined in numpy
• it is used to construct array object
• We need to specify the shape of array and type of array in the construction.
• When we don’t specify the type of data in array construction, by default the elements are float type.

import numpy as np
arr = np.ndarray(shape=(5))
print("Size :",arr.size)
print("Datatype :",arr.dtype)

We can specify the type in the construction of Array:

import numpy as np
arr = np.ndarray(shape=(5),dtype=int)
print("Size :",arr.size)
print("Datatype :",arr.dtype)

Read size of array and construct:

• When we don’t specify the size, it is by default float type.
• Once array has been constructed, all elements are default values.

import numpy as np
n = int(input("Enter size :"))
arr = np.ndarray(shape=(n),dtype=int)
print("Elements are :")
for ele in arr:
    print(ele)