```sh
text = write_properties [--prefix prefix] [names]
```
Creates a properties string from the provided list of variable names (not values).
### Parameters
* Optional prefix which will be added to all written properties.
* A list of variable names.
### Return Value
The properties text value.
### Examples
```sh
a = set 1
b = set 2
a.b.c = set 3
# text will be equal to:
# a=1
# b=2
# a.b.c=3
text = write_properties a b a.b.c
# text will be equal to:
# P.a=1
# P.b=2
# P.a.b.c=3
text = write_properties --prefix P a b a.b.c
```