• Difficulty Level : Medium
• Last Updated : 28 Nov, 2018

`numpy.add()` function is used when we want to compute the addition of two array. It add arguments element-wise. If shape of two arrays are not same, that is `arr1.shape != arr2.shape`, they must be broadcastable to a common shape (which may be the shape of one or the other).

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

Parameters :
arr1 : [array_like or scalar] Input array.
arr2 : [array_like or scalar] 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.
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 sum of arr1 and arr2, element-wise. Returns a scalar if both arr1 and arr2 are scalars.

Code #1 : Working

 `# Python program explaining ` `# numpy.add() function ` `# when inputs are scalar ` ` `  `import` `numpy as geek ` `in_num1 ``=` `10` `in_num2 ``=` `15` ` `  `print` `(``"1st Input  number : "``, in_num1) ` `print` `(``"2nd Input  number : "``, in_num2) ` `   `  `out_num ``=` `geek.add(in_num1, in_num2)  ` `print` `(``"output number after addition  : "``, out_num)  `

Output :

```1st Input  number :  10
2nd Input  number :  15
output number after addition  :  25
```

Code #2 :

 `# Python program explaining ` `# numpy.add() function ` `# when inputs are array ` ` `  `import` `numpy as geek ` ` `  `in_arr1 ``=` `geek.array([[``2``, ``-``7``, ``5``], [``-``6``, ``2``, ``0``]]) ` `in_arr2 ``=` `geek.array([[``5``, ``8``, ``-``5``], [``3``, ``6``, ``9``]]) ` `  `  `print` `(``"1st Input array : "``, in_arr1)  ` `print` `(``"2nd Input array : "``, in_arr2)  ` `   `  `out_arr ``=` `geek.add(in_arr1, in_arr2)  ` `print` `(``"output added array : "``, out_arr)  `

Output :

```1st Input array :  [[ 2 -7  5]
[-6  2  0]]
2nd Input array :  [[ 5  8 -5]
[ 3  6  9]]
output added array :  [[ 7  1  0]
[-3  8  9]]
```

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