# process.envs

## Function

Set child process environment variables in batches.

## Syntax

```bt
process(program).envs(values)
```

## Parameters

| Parameters | Type | Required | Default value | Description |
| ------ | ------ | ------ | ------ | ------ |
| values | Object | No | None | Environment variable mapping object; rules for keys and values are given below. |

## values object structure

| key | value type | description |
| ------ | ------ | ------ |
| Environment variable name | Any | The value to be written to the subprocess environment variable; it will be converted to a string when called. |

## Return value

| Type | Description |
| ------ | ------ |
| Process | Returns the new process builder. |

## Example

```bt
// Set the BT_ENV environment variable for the child process.
cmd = process('cmd').envs({BT_ENV: '1'})
result = cmd.get_envs()

// Output: {"BT_ENV":"1"}
print result
```

## Notes

- The object value will be converted to a string first.