![[Google Cloud Documentation]](https://www.gstatic.com/devrel-devsite/prod/v0f3a5b8b76e4a120372a69044e02756e703b6140f9f1812c6e4a0407b19864b7/clouddocs/images/lockup_full_color.svg){kind=link}
![[]](https://docs.cloud.google.com/_static/clouddocs/images/icons/categories/devops-color.svg){kind=link}
Creates a copy of a list with a new element added to the beginning.
Arguments
| Arguments | |
|---|---|
objs |
The source list. Note that this list is not modified. |
val |
The element that will be prepended to the beginning. |
Returns
A copy of objs with val added to the beginning.
Raised exceptions
| Exceptions | |
|---|---|
TypeError |
If objs is not a list. |
Examples
# Prepend `val` to start of copy of `my_list` # Returns `["three","zero","one","two"]` - init: assign: - my_list: ["zero","one","two"] - val: "three" - returnStep: return: ${list.prepend(my_list, val)}