A boolean array can be created manually by using `dtype=bool`

when creating the array. Values other than `0`

, `None`

, `False`

or empty strings are considered True.

```
import numpy as np
bool_arr = np.array([1, 0.5, 0, None, 'a', '', True, False], dtype=bool)
print(bool_arr)
# output: [ True True False False True False True False]
```

Alternatively, numpy automatically creates a boolean array when comparisons are made between arrays and scalars or between arrays of the same shape.

```
arr_1 = np.random.randn(3, 3)
arr_2 = np.random.randn(3, 3)
bool_arr = arr_1 < 0.5
print(bool_arr.dtype)
# output: bool
bool_arr = arr_1 < arr_2
print(bool_arr.dtype)
# output: bool
```