# Conditions & Match | EasyNet Docs

Source: https://easynet.run/docs/aal/control-flow

# Conditions & Match

Turn inputs into explicit decisions.

if chooses a branch from a Boolean condition. An if ... then ... else ... expression needs both results. match selects the first matching arm in source order.

## Complete example

Save the example as control-flow.aal
control-flow.aal

```
agent Tutorial is Agent
  public
    ability run(score: Int) -> String effects()
      require score >= 0, "Score must be nonnegative"
      grade = if score >= 6 then "ready" else "revise"
      return match grade
        "ready" -> "Publish"
        _ -> "Review again"
```

[Download .aal](data:text/plain;charset=utf-8,agent%20Tutorial%20is%20Agent%0A%20%20public%0A%20%20%20%20ability%20run(score%3A%20Int)%20-%3E%20String%20effects()%0A%20%20%20%20%20%20require%20score%20%3E%3D%200%2C%20%22Score%20must%20be%20nonnegative%22%0A%20%20%20%20%20%20grade%20%3D%20if%20score%20%3E%3D%206%20then%20%22ready%22%20else%20%22revise%22%0A%20%20%20%20%20%20return%20match%20grade%0A%20%20%20%20%20%20%20%20%22ready%22%20-%3E%20%22Publish%22%0A%20%20%20%20%20%20%20%20_%20-%3E%20%22Review%20again%22%0A)

## Syntax explained

Use ==, !=, <, <=, >, >=, in and not in. Comparisons may chain: 40 <= area < 100. Combine conditions with and or or.

require condition, "message" fails with E_REQUIREMENT when false. Place it before the operation it protects.

match supports literals, nullary enums, None and bindings. Put the _ catch-all last. Destructuring patterns are not supported.

## Build and run
Terminal

```
cargo run --locked --bin aalc -- check control-flow.aal

cargo run --locked --bin aalc -- build control-flow.aal -o control-flow.aalc

cargo run --locked --bin aalc -- run control-flow.aalc \
  --agent Tutorial --ability run \
  --args '{"score":7}' \
  --state-dir .aal-tutorial/control-flow --invocation control-flow-1
```

Run with a fresh state directory. The returned value is shown below; the CLI also prints execution information.
Expected result

```
"Publish"
```

## Try it yourself

Try score 3 to get Review again, then -1 to trigger require before grade is computed. Use a new invocation ID for each request.
[Language source and specification](https://github.com/Brain-Cell-Coding/Agent-Assembly-Language/blob/main/docs/match-patterns.md)