**`numpy.append()`** is used to append values to the end of an array. It takes in the following arguments:

* **`arr`**: `values` are attached to a copy of this array. 

* **`values`**: these values are appended to `arr`.

* **`axis`**: this is an optional parameter that specifies the axis along with which values are appended. If the axis is not specified, then `arr` and `values` are flattened out.

> `numpy.append()` does not alter the original array, instead, it returns a new array.

Take a look at the function signature below:

# C​ode


In the first code snippet, the axis is not specified,​ so `arr` and `values` are flattened out.

import numpy as np
print(np.append([1, 2, 3], [['a', 'b', 'c'], [7, 8, 9]]))

In the following code snippet, values are appended along axis 1.

import numpy as np
print(np.append([[4, 5, 6]], [[7, 8, 9]], axis = 1))
# Try setting the axis to 0

For more details, refer to the [official documentation](https://numpy.org/doc/stable/reference/generated/numpy.append.html).

How to append numpy arrays

Use numpy.append() to add values to the end of an array, specifying an optional axis.

How to append numpy arrays

C​ode

Code