ndarry term .round() is added

content/numpy/concepts/ndarray/terms/round/round.md

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+---
+Title: 'round()'
+Description: 'Returns a new array with each element rounded to the specified number of decimals.'
+Subjects:
+  - 'Code Foundations'
+  - 'Computer Science'
+Tags:
+  - 'Arrays'
+  - 'Elements'
+  - 'Methods'
+  - 'NumPy'
+CatalogContent:
+  - 'learn-python-3'
+  - 'paths/data-science'
+---
+
+The **`round()`** method in NumPy rounds each element of an [array](https://www.codecademy.com/resources/docs/numpy/ndarray) to the nearest integer or to a specified number of decimal places. Values exactly halfway between two numbers are rounded to the nearest even value (also known as banker’s rounding).
+
+## Syntax
+
+```pseudo
+ndarray.round(decimals=0, out=None)
+```
+
+**Parameters:**
+
+- `decimals` (int, optional): Number of decimal places to round to. Default is 0. Can be negative to round to the left of the decimal point.
+- `out` (ndarray, optional): An alternative output array where results are stored. Must be the same shape as the input.
+
+**Return value:**
+
+Returns an array with elements rounded to the specified number of decimals. If `out` is provided, the result is stored in that array, and a reference to it is returned.
+
+## Example 1: Round to the nearest whole number
+
+This example rounds all elements in a NumPy array to the nearest integer:
+
+```py
+import numpy as np
+
+arr = np.array([1.34566, 4.55, 7.788, 2.09, 9.45])
+rounded_arr = arr.round()
+
+print(rounded_arr)
+```
+
+This produces the following output:
+
+```shell
+[1. 5. 8. 2. 9.]
+```
+
+## Example 2: Round to specific decimal places
+
+This example rounds all elements in a NumPy array to two decimal places:
+
+```py
+import numpy as np
+
+ndarray = np.array([1.34566, 4.55, 7.788, 2.09, 9.45])
+two_decimal_places = np.round(ndarray, decimals=2)
+
+print(two_decimal_places)
+```
+
+This produces the following output:
+
+```shell
+[1.35 4.55 7.79 2.09 9.45]
+```
+
+## Codebyte Example
+
+This example shows how to round NumPy array elements to various decimal places using `round()`:
+
+```codebyte/python
+import numpy as np
+
+ndarray = np.array([1.34566, 4.55, 7.788, 2.09, 9.45])
+
+# Round off to the nearest whole number
+nearest_whole_number = np.round(ndarray)
+print(nearest_whole_number)
+
+# Round off to 2 decimal places
+two_decimal_places = np.round(ndarray, decimals=2)
+print(two_decimal_places)
+```