And you can also declare body parameters as optional, by setting the default to `None`:

{* ../../docs_src/body_multiple_params/tutorial001_an_py310.py hl[18:20] *}

/// note

Notice that, in this case, the `item` that would be taken from the body is optional. As it has a `None` default value.

///

## Multiple body parameters { #multiple-body-parameters }

    state = State.DONE;
    return null;
  }

  @Override
  public final boolean hasNext() {
    checkState(state != State.FAILED);
    switch (state) {
      case DONE:
        return false;
      case READY:
        return true;
      default:
    }
    return tryToComputeNext();
  }

  private boolean tryToComputeNext() {
    state = State.FAILED; // temporary pessimism

*   `tf.nn.embedding_lookup_sparse`

    *   Optimized this function for some cases by fusing internal operations.

*   `tf.saved_model.SaveOptions`

    int readDataWireFormat(final byte[] buffer, final int bufferIndex, final int len) {
        return switch (informationLevel) {
        case SMB_INFO_ALLOCATION -> readSmbInfoAllocationWireFormat(buffer, bufferIndex);
        case SMB_QUERY_FS_SIZE_INFO -> readSmbQueryFSSizeInfoWireFormat(buffer, bufferIndex);
        case SMB_FS_FULL_SIZE_INFORMATION -> readFsFullSizeInformationWireFormat(buffer, bufferIndex);
        default -> 0;
        };
    }

		expectErr := (err != nil)

		if expectErr != testCase.expectErr {
			t.Fatalf("case %v: error: expected: %v, got: %v\n", i+1, testCase.expectErr, expectErr)
		}

		if !testCase.expectErr {
			if !reflect.DeepEqual(result, testCase.expectedResult) {
				t.Fatalf("case %v: result: expected: %+v, got: %+v\n", i+1, testCase.expectedResult, result)
			}
		}
	}
}

			switch hkv.Key {
			case config.EtcdSubSys:
				off = !etcd.Enabled(item.Config)
			case config.StorageClassSubSys:
				off = !storageclass.Enabled(item.Config)
			case config.PolicyPluginSubSys:
				off = !polplugin.Enabled(item.Config)
			case config.IdentityOpenIDSubSys:
				off = !openid.Enabled(item.Config)
			case config.IdentityLDAPSubSys:
				off = !xldap.Enabled(item.Config)

                switch (xObj.type()) {
                case BOOLEAN:
                    final Boolean b = (Boolean) xObj.value();
                    buf.append(getResultDataBody(entry.getKey(), b.toString()));
                    break;
                case NUMBER:
                    final Number d = (Number) xObj.value();

		// the chunk size to be of variable width. In particular,
		// a size of 16 is encoded as `10` while a size of 64 KB
		// is `10000`.
		switch {
		case b >= '0' && b <= '9':
			size = size<<4 | int(b-'0')
		case b >= 'a' && b <= 'f':
			size = size<<4 | int(b-('a'-10))
		case b >= 'A' && b <= 'F':
			size = size<<4 | int(b-('A'-10))
		default:
			cr.err = errMalformedEncoding
			return n, cr.err
		}

  /**
   * Add {@code node} as a predecessor to the origin node. In the case of an undirected graph, it
   * also becomes a successor. Associates {@code value} with the edge connecting the two nodes.
   */
  void addPredecessor(N node, V value);

  /**
   * Add {@code node} as a successor to the origin node. In the case of an undirected graph, it also

# Deploy FastAPI on Cloud Providers { #deploy-fastapi-on-cloud-providers }

You can use virtually **any cloud provider** to deploy your FastAPI application.

In most of the cases, the main cloud providers have guides to deploy FastAPI with them.

## Cloud Providers - Sponsors { #cloud-providers-sponsors }