> ## Documentation Index > Fetch the complete documentation index at: https://80x.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # If > The If block (Conditions) routes a workflow down one of two paths based on whether its conditions are true. The **If** block (Conditions) routes a workflow down one of two paths based on whether its conditions are true. The true path runs when every condition matches. The false path runs in every other case. The block only checks logic, so it costs no credits and produces no data. | | | | - | - | | **Category** | Conditions | | **Credit cost** | Free. Logic blocks consume no credits | | **Engine** | New Workflows engine (June 2026+) | | **Plan availability** | All plans | | **Limits** | None documented. | ## Inputs | Input | Type | Required | Default | Notes | | - | - | - | - | - | | Conditions | Condition group | Yes | None | The true path runs when the conditions match. The false path runs otherwise. Conditions can compare trigger data, earlier step outputs, or record attributes. | ## Outputs None. The **If** block decides which downstream path runs. It does not expose a data output of its own. To use data, reference the outputs from the blocks you place on each path, not from **If** itself. For example, a record updated on the true path is available downstream as `{{ steps.update_record.record_id }}`. ## Behavior The **If** block checks its conditions once, the moment the run reaches it. After that it commits to a single path for the rest of that run. The true path runs when every condition in the group is satisfied. The false path runs whenever even one condition is not met. This includes the case where an input is empty or has no value at all. Only one path ever runs per execution. Each path is independent. You can connect blocks to the true path, the false path, both, or neither. A path with no blocks connected simply ends the run quietly when it is taken. That is a valid way to stop on the false branch. By default, the two paths never rejoin. So a block that runs only on the true path produces an output that does not exist on the false path. To learn how to pass data between branches, see [Variables & data passing](/explanation/variables). ## Gotchas * **The false path runs on empty input, not just on a logical "no".** A condition such as `Owner is jane@acme.com` fails in two cases. It fails when the owner is someone else, and it fails when the record has no owner at all. If a missing value should take a different route, add an explicit "is not empty" condition first. * **More than two outcomes belong in Switch, not nested If blocks.** Chaining several **If** blocks to handle three or more cases is hard to read in run history and easy to misorder. Use [Switch](/reference/conditions/switch) for ordered multi-case routing instead. * **Downstream blocks see only their own branch's outputs.** A block on the false path cannot reference an output produced on the true path, because that block never ran. Compute any shared value before the **If** block so both paths can read it. * **Legacy workflows called this block If/else.** If you are migrating, the new engine renames it to **If**. The routing behavior is unchanged. See [Migrate legacy workflows](/guides/migrating-from-legacy). ## Examples ### Routing a deal by amount Send large deals to a Slack alert and let smaller deals continue silently. | Field | Value | | - | - | | Condition | `Amount` is greater than `50000` | | True path | [Broadcast message](/reference/workspace/broadcast-message) to `#big-deals` | | False path | No blocks connected | A deal worth `75000` takes the true path and posts to `#big-deals`. A deal worth `12000` takes the false path, and the run ends without an alert. ### Splitting traffic for an A/B test Pair the **If** block with a random number to assign records to two variants in roughly equal shares. | Field | Value | | - | - | | Upstream block | [Random number](/reference/calculations/random-number) with minimum `0`, maximum `1` | | Condition | `{{ steps.random_number.result }}` is greater than `0.5` | | True path | [Update record](/reference/records/update-record) sets `Variant` to `A` | | False path | [Update record](/reference/records/update-record) sets `Variant` to `B` | A record that draws `0.81` is tagged `Variant A`. A record that draws `0.22` is tagged `Variant B`. Over many runs, this gives an even split. ### Guarding against a missing email Branch on whether a contact has an email before enrolling them in a sequence. | Field | Value | | - | - | | Condition | `Email` is not empty | | True path | [Enroll in sequence](/reference/sequences/enroll-in-sequence) `Outbound welcome` | | False path | [Create task](/reference/tasks/create-task) "Find email for Priya Sharma" assigned to the owner | A contact with `priya@acme.com` is enrolled in `Outbound welcome`. A contact with no email instead creates a follow-up task for the owner, so no run silently does nothing. ## Source [Attio Workflows block library](https://attio.com/help/reference/automations/workflows/workflows-block-library). Last reviewed against the Attio Help Center, June 2026. ## See also * [Switch](/reference/conditions/switch) * [Filter](/reference/conditions/filter) * [Conditions & filters](/explanation/conditions-and-filters) * [Inbound routing by territory and seniority](/guides/route-and-sequence/territory-routing) * [Attio Workflows block library](https://attio.com/help/reference/automations/workflows/workflows-block-library) This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.