# numpy.subtract() in Python

• Difficulty Level : Basic
• Last Updated : 10 Feb, 2019

`numpy.subtract()` function is used when we want to compute the difference of two array.It returns the difference of arr1 and arr2, element-wise.

Syntax : numpy.subtract(arr1, arr2, /, out=None, *, where=True, casting=’same_kind’, order=’K’, dtype=None, subok=True[, signature, extobj], ufunc ‘subtract’)

Parameters :
arr1 : [array_like or scalar]1st Input array.
arr2 : [array_like or scalar]2nd Input array.
dtype : The type of the returned array. By default, the dtype of arr is used.
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.
where : [array_like, optional] Values of True indicate to calculate the ufunc at that position, values of False indicate to leave the value in the output alone.
**kwargs : Allows to pass keyword variable length of argument to a function. Used when we want to handle named argument in a function.

Return : [ndarray or scalar] The difference of arr1 and arr2, element-wise. Returns a scalar if both arr1 and arr2 are scalars.

Code #1 :

 `# Python program explaining``# numpy.subtract() function`` ` `import` `numpy as geek``in_num1 ``=` `4``in_num2 ``=` `6`` ` `print` `(``"1st Input  number : "``, in_num1)``print` `(``"2nd Input  number : "``, in_num2)``   ` `out_num ``=` `geek.subtract(in_num1, in_num2) ``print` `(``"Difference of two input number : "``, out_num) `

Output :

```1st Input number :  4
2nd Input number :  6
Difference of two input number :  -2
```

Code #2 :

 `# Python program explaining``# numpy.subtract() function`` ` `import` `numpy as geek`` ` `in_arr1 ``=` `geek.array([[``2``, ``-``4``, ``5``], [``-``6``, ``2``, ``0``]])``in_arr2 ``=` `geek.array([[``0``, ``-``7``, ``5``], [``5``, ``-``2``, ``9``]])``  ` `print` `(``"1st Input array : "``, in_arr1)``print` `(``"2nd Input array : "``, in_arr2)``  ` `   ` `out_arr ``=` `geek.subtract(in_arr1, in_arr2) ``print` `(``"Output array: "``, out_arr) `

Output :

```1st Input array :  [[ 2 -4  5]
[-6  2  0]]
2nd Input array :  [[ 0 -7  5]
[ 5 -2  9]]
Output array:  [[  2   3   0]
[-11   4  -9]]

```

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