# Available Code Actions
## `eliminate_unused_vars`
This code action will eliminate unused variables in code.
```erg
foo = 1
for! 0..3, i =>
print! 1
```
↓
```erg
for! 0..3, _ =>
print! 1
```
## `change_case`
This code action will change non-snake case variables to snake case.
```erg
fooBar = 1
```
↓
```erg
foo_bar = 1
```
## `inline_variables`
This code action will inline variables.
```erg
two = 1 + 1
print! two
print! two * 1
```
↓
```erg
print! 1 + 1
print!((1 + 1) * 1)
```
## `extract_variables`
This code action will extract variables.
```erg
↓
```erg
new_var = 1 + 1
print! new_var
```
## `extract_functions`
This code action will extract functions.
```erg
if foo, do:
# |...| is selected
|for arr, i =>
...
bar()|
```
↓
```erg
new_func() =
for arr, i =>
...
bar()
if foo, do:
new_func()
```