> ## Documentation Index > Fetch the complete documentation index at: https://docs.kodeflowstudios.com/llms.txt > Use this file to discover all available pages before exploring further. # Using Branch Nodes `Branch Nodes` are nodes that you can use to create loops and create `if` statements inside the dialogue file itself without needing to make logic with code. ## Set Flags Another way could be to set some flags through code like bought two items out of a three item pool: ```yaml theme={null} start: Speaker: "Merchant" Text: "What will you buy?" Choices: - Text: "Camera" NextNode: node_camera - Text: "Piano Keyboard" NextNode: node_piano - Text: "Guitar" NextNode: node_guitar node_camera: Speaker: "Merchant" Text: "Great choice! That'll be $300." SetFlags: - bought_item NextNode: can_buy node_piano: Speaker: "Merchant" Text: "Great choice! That'll be $500." SetFlags: - bought_item node_guitar: Speaker: "Merchant" Text: "Great choice! That'll be $200." SetFlags: - bought_item can_buy: CheckFlags: - max_bought TrueNode: node_done FalseNode: start node_done: Speaker: "You" Text: "Oop, that's all I can afford for now! Thanks for your service." ``` And the code for it would look something like: ```csharp theme={null} int totalItems = 0; if (parleyYaml.Flags.IsFlagSet("bought_item")) { totalItems++; parleyYaml.Flags.ClearFlag("bought_item"); } if (totalItems >= 2) { parleyYaml.Flags.SetFlag("max_bought"); } ``` For more info on Flags, check [FlagHandler](/parley/reference/scripting/flag-handling/flag-handler). ## Loops You can create a loop in your dialogue using a branch node by having it keep rechecking a flag until it is true, here are several ways you can use this: ```yaml theme={null} node_1: Speaker: "Robin" Text: "What will we eat today?" Choices: - Text: "Pizza" NextNode: node_2 - Text: "Burger" SetFlags: # can be used either way, in choice or in node. - wants_burger NextNode: node_4 node_2: SetFlags: - wants_pizza node_3: CheckFlags: - wants_pizza TrueNode: node_5 FalseNode: node_4 node_4: Speaker: "Robin" Text: "Ew No!!" NextNode: node_1 node_5: Speaker: "Robin" Text: "YESSS My favourite!" ``` ## Item Validation You could also have a person keep saying something or an action keep getting repeated if for example the player is missing an item! ```yaml theme={null} node_1: Speaker: "Guard" Text: "Who goes there!" NextNode: node_2 node_2: Speaker: "Peasant" Text: "Just a passer by, I need to get into the caslte." NextNode: armour_check armour_check: CheckFlags: - is_wearing_armour TrueNode: node_3 FalseNode: node_4 node_3: Speaker: "Guard" Text: "Get our of hear before I put your head on a stick!" node_4: Speaker: "Guard" Text: "Of course, welcome back. His majesty was looking for you." ``` And the code would be a simple `SetFlag("is_wearing_armour")` before running the dialgoue. ## Hanging Dialogue You could also make a dialogue hang until something happens, instead of quitting the dialogue, simply set a flag that would hide the UI, and have the player do something. For example we could make a character refuse to continue a dialogue before the player talks to another character. ```yaml theme={null} node_5: Speaker: "Hisham" Text: "Please go ask Monica first.." NextNode: ask_check ask_check: CheckFlags: - asked_monica TrueNode: node_6 FalseNode: node_5 node_6: # dialogue continues ``` And the code would only need to call `SetFlag("asked_monica")` when the player interacts with the character named Monica, then hiding the UI. As you can see, while the building blocks are simple by design, they open a lot of possibilites and allow for some fairly versatile options. For more info on branch nodes, see [Reference: Branch Node](/parley/reference/yaml-syntax#branch-node). ## Set Flags Another way could be to set some flags through code like bought two items out of a three item pool: ![Set Flags Graph](https://cortado-bucket.lon1.cdn.digitaloceanspaces.com/dohttps://cortado-bucket.lon1.cdn.digitaloceanspaces.com/docs/resources/images/Parley/parley_howto_branch_node_set_flags.png) And the code for it would look something like: ```csharp theme={null} int totalItems = 0; if (parleyYaml.Flags.IsFlagSet("bought_item")) { totalItems++; parleyYaml.Flags.ClearFlag("bought_item"); } if (totalItems >= 2) { parleyYaml.Flags.SetFlag("max_bought"); } ``` For more info on Flags, check [FlagHandler](/parley/reference/scripting/flag-handling/flag-handler). ## Loops You can create a loop in your dialogue using a branch node by having it keep rechecking a flag until it is true, here are several ways you can use this: ![Loops Graph](https://cortado-bucket.lon1.cdn.digitaloceanspaces.com/dohttps://cortado-bucket.lon1.cdn.digitaloceanspaces.com/docs/resources/images/Parley/parley_howto_branch_node_loops.png) ## Item Validation You could also have a person keep saying something or an action keep getting repeated if for example the player is missing an item! ![Item Validation Graph](https://cortado-bucket.lon1.cdn.digitaloceanspaces.com/dohttps://cortado-bucket.lon1.cdn.digitaloceanspaces.com/docs/resources/images/Parley/parley_howto_branch_node_item_validation.png) And the code would be a simple `SetFlag("is_wearing_armour")` before running the dialgoue. ## Hanging Dialogue You could also make a dialogue hang until something happens, instead of quitting the dialogue, simply set a flag that would hide the UI, and have the player do something. For example we could make a character refuse to continue a dialogue before the player talks to another character. ![Hanging Dialogue Graph](https://cortado-bucket.lon1.cdn.digitaloceanspaces.com/dohttps://cortado-bucket.lon1.cdn.digitaloceanspaces.com/docs/resources/images/Parley/parley_howto_branch_node_hanging_dialogue.png) And the code would only need to call `SetFlag("asked_monica")` when the player interacts with the character named Monica, then hiding the UI. As you can see, while the building blocks are simple by design, they open a lot of possibilites and allow for some fairly versatile options. For more info on branch nodes, see [Reference: Branch Node](/parley/reference/yaml-syntax#branch-node).