# call

## Function

Dynamically call a function by function name or function value.

## Syntax

```bt
call(fn_or_name, arg1, arg2, ...)
```

## Parameters

| Parameters | Type | Required | Default value | Description |
| ------ | ------ | ------ | ------ | ------ |
| fn_or_name | String/Fn | Yes | None | Function name or function value. |
| argN | Any | No | None | Arguments passed to the target function. |

## Return value

| Type | Description |
| ------ | ------ |
| Any | Returns the return value of the target function. |

## Example

```bt
fn add(a, b) { a + b }
result = call('add', 1, 2)

// Output: 3
print result
```

## Notes

- When calling by name, the user global function will be checked first, and then the system function will be checked.