Add Dart Map .addEntries() term entry

content/dart/concepts/map/terms/add-entries/add-entries.md

@@ -0,0 +1,59 @@
+---
+Title: '.addEntries()'
+Description: 'Adds multiple key-value pairs to an existing Map using an iterable of MapEntry objects.'
+Subjects:
+  - 'Computer Science'
+  - 'Data Science'
+Tags:
+  - 'Dart'
+  - 'Map'
+  - 'Methods'
+CatalogContent:
+  - 'learn-dart'
+  - 'paths/computer-science'
+---
+
+In Dart, the **`.addEntries()`** method adds multiple key-value pairs to an existing `Map` using an iterable of `MapEntry` objects. It’s useful for inserting several entries at once, such as when transforming lists into maps or merging data.
+
+## Syntax
+
+```pseudo
+mapVariable.addEntries(iterableOfMapEntries)
+```
+
+**Parameters:**
+
+- `iterableOfMapEntries`: An iterable of `MapEntry<K, V>` objects, where `K` and `V` match the map’s key and value types.
+
+**Return value:**
+
+- `void`: The method does not return anything; it modifies the existing map in place.
+
+## Example
+
+The following example demonstrates how `.addEntries()` can be used to add multiple entries to a `Map`:
+
+```dart
+void main() {
+  Map<String, int> inventory = {
+    'Apples': 5,
+    'Bananas': 3
+  };
+
+  // Creating an iterable of MapEntry objects
+  var newItems = [
+    MapEntry('Oranges', 4),
+    MapEntry('Grapes', 10)
+  ];
+
+  inventory.addEntries(newItems);
+
+  print(inventory);
+}
+```
+
+The output of this code is as follows:
+
+```shell
+{Apples: 5, Bananas: 3, Oranges: 4, Grapes: 10}
+```