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# numpy.invert() in Python

• Last Updated : 29 Nov, 2018

numpy.invert() function is used to Compute the bit-wise Inversion of an array element-wise. It computes the bit-wise NOT of the underlying binary representation of the integers in the input arrays.

For signed integer inputs, the two’s complement is returned. In a two’s-complement system negative numbers are represented by the two’s complement of the absolute value.

Syntax : numpy.invert(x, /, out=None, *, where=True, casting=’same_kind’, order=’K’, dtype=None, ufunc ‘invert’)

Parameters :
x : [array_like] Input array.
out : [ndarray, optional] A location into which the result is stored. If provided, it must have a shape that the inputs broadcast to. If not provided or None, a freshly-allocated array is returned.
**kwargs : Allows you to pass keyword variable length of argument to a function. It is used when we want to handle named argument in a function.
where : [array_like, optional] True value means to calculate the universal functions(ufunc) at that position, False value means to leave the value in the output alone.

Return : [ndarray or scalar] Result. This is a scalar if x is scalar.

Code #1 : Working

 `# Python program explaining``# invert() function`` ` `import` `numpy as geek``in_num ``=` `10``print` `(``"Input  number : "``, in_num)``   ` `out_num ``=` `geek.invert(in_num) ``print` `(``"inversion of 10 : "``, out_num) `

Output :

```Input  number :  10
inversion of 10 :  -11
```

Code #2 :

 `# Python program explaining``# invert() function`` ` `import` `numpy as geek`` ` `in_arr ``=` `[``2``, ``0``, ``25``]``print` `(``"Input array : "``, in_arr)``   ` `out_arr ``=` `geek.invert(in_arr) ``print` `(``"Output array after inversion: "``, out_arr) `

Output :

```Input array :  [2, 0, 25]
Output array after inversion:  [ -3  -1 -26]
```

Code #3 :

 `# Python program explaining``# invert() function`` ` `import` `numpy as geek`` ` `in_arr ``=` `[``True``, ``False``]``print``(``"Input array : "``, in_arr) `` ` `   ` `out_arr ``=` `geek.invert(in_arr) ``print` `(``"Output array after inversion: "``, out_arr) `

Output :

```Input array :  [True, False]
Output array after inversion:  [False  True]
```

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