# For

Apply a list of transformations to each element of an array.

## Example

This example shows how to use the For transformation to apply a list of transformations to each element of an array.

```json
{
  "operation": "for",
  "arguments": {
    "key": "items",
    "transformations": [
      {
        "math_multiply_with_value": {
          "key": "price",
          "value": 1.1,
          "new_key": "discounted_price"
        }
      },
      {
        "rename_key": {
          "key": "name",
          "new_key": "product_name"
        }
      }
    ]
  }
}
```

Given the input record:

```json
{
  "items": [
    {"name": "Item 1", "price": 100},
    {"name": "Item 2", "price": 200},
    {"name": "Item 3", "price": 300}
  ]
}
```

The output record will be:

```json
{
  "items": [
    {"product_name": "Item 1", "price": 100, "discounted_price": 110},
    {"product_name": "Item 2", "price": 200, "discounted_price": 220},
    {"product_name": "Item 3", "price": 300, "discounted_price": 330}
  ]
}
```