Merge pull request #737 from qdrant/integer-index

docs: Parameterized int index Java, C# examples

qdrant-landing/content/documentation/concepts/indexing.md

@@ -374,6 +374,52 @@ client
     .await?;
 ```
 
+```java
+import io.qdrant.client.QdrantClient;
+import io.qdrant.client.QdrantGrpcClient;
+import io.qdrant.client.grpc.Collections.IntegerIndexParams;
+import io.qdrant.client.grpc.Collections.PayloadIndexParams;
+import io.qdrant.client.grpc.Collections.PayloadSchemaType;
+
+QdrantClient client =
+    new QdrantClient(QdrantGrpcClient.newBuilder("localhost", 6334, false).build());
+
+client
+    .createPayloadIndexAsync(
+        "{collection_name}",
+        "name_of_the_field_to_index",
+        PayloadSchemaType.Integer,
+        PayloadIndexParams.newBuilder()
+            .setIntegerIndexParams(
+                IntegerIndexParams.newBuilder().setLookup(false).setRange(true).build())
+            .build(),
+        null,
+        null,
+        null)
+    .get();
+```
+
+```csharp
+using Qdrant.Client;
+using Qdrant.Client.Grpc;
+
+var client = new QdrantClient("localhost", 6334);
+
+await client.CreatePayloadIndexAsync(
+    collectionName: "{collection_name}",
+    fieldName: "name_of_the_field_to_index",
+    schemaType: PayloadSchemaType.Integer,
+    indexParams: new PayloadIndexParams
+    {
+	    IntegerIndexParams = new()
+	    {
+		    Lookup = false,
+		    Range = true
+	    }
+    }
+);
+```
+
 ## Vector Index
 
 A vector index is a data structure built on vectors through a specific mathematical model.