# numpy.round_() in Python

numpy.round_(arr, decimals = 0, out = None) : This mathematical function round an array to the given number of decimals.

Parameters :

array : [array_like] Input array.
decimal : [int, optional] Decimal places we want to round off.

Default = 0. In case of -ve decimal, it specifies the n0. of positions to the left of the decimal point.

out : [optional] Output resulted array

Return :

```An array with all array elements being
rounded off, having same type as input. ```

Code #1 : Working

 `# Python program explaining ` `# round_() function ` `import` `numpy as np ` ` `  `in_array ``=` `[.``5``, ``1.5``, ``2.5``, ``3.5``, ``4.5``, ``10.1``] ` `print` `(``"Input array : \n"``, in_array) ` ` `  `round_off_values ``=` `np.round_(in_array) ` `print` `(``"\nRounded values : \n"``, round_off_values) ` ` `  ` `  `in_array ``=` `[.``53``, ``1.54``, .``71``] ` `print` `(``"\nInput array : \n"``, in_array) ` ` `  `round_off_values ``=` `np.round_(in_array) ` `print` `(``"\nRounded values : \n"``, round_off_values) ` ` `  `in_array ``=` `[.``5538``, ``1.33354``, .``71445``] ` `print` `(``"\nInput array : \n"``, in_array) ` ` `  `round_off_values ``=` `np.round_(in_array, decimals ``=` `3``) ` `print` `(``"\nRounded values : \n"``, round_off_values) `

Output :

```Input array :
[0.5, 1.5, 2.5, 3.5, 4.5, 10.1]

Rounded values :
[  0.   2.   2.   4.   4.  10.]

Input array :
[0.53, 1.54, 0.71]

Rounded values :
[ 1.  2.  1.]

Input array :
[0.5538, 1.33354, 0.71445]

Rounded values :
[ 0.554  1.334  0.714]```

Code #2 : Working

 `# Python program explaining ` `# round_() function ` `import` `numpy as np ` ` `  `in_array ``=` `[``1``, ``4``, ``7``, ``9``, ``12``] ` `print` `(``"Input array : \n"``, in_array) ` ` `  `round_off_values ``=` `np.round_(in_array) ` `print` `(``"\nRounded values : \n"``, round_off_values) ` ` `  ` `  `in_array ``=` `[``133``, ``344``, ``437``, ``449``, ``12``] ` `print` `(``"\nInput array : \n"``, in_array) ` ` `  `round_off_values ``=` `np.round_(in_array, decimals ``=` `-``2``) ` `print` `(``"\nRounded values upto 2: \n"``, round_off_values) ` ` `  `in_array ``=` `[``133``, ``344``, ``437``, ``449``, ``12``] ` `print` `(``"\nInput array : \n"``, in_array) ` ` `  `round_off_values ``=` `np.round_(in_array, decimals ``=` `-``3``) ` `print` `(``"\nRounded values upto 3: \n"``, round_off_values) `

Output :

```Input array :
[1, 4, 7, 9, 12]

Rounded values :
[ 1  4  7  9 12]

Input array :
[133, 344, 437, 449, 12]

Rounded values upto 2:
[100 300 400 400   0]

Input array :
[133, 344, 437, 449, 12]

Rounded values upto 3:
[0 0 0 0 0]```

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