# Code blocks
## Empty code block
```µcad,test_empty
```
## Code block with failing test
```µcad,test_fail#fail
Circle(r = 42mm);
```
## Code block with parameters
```µcad,test_params(hires)
Rect(r = 42mm);
```
## Code block with test result and parameters
[](.test/test_params.log)
```µcad,test_result_params#fail(no_format)
Rect(r = 42mm);
```
## Multi-line Code block
[](.test/multi_line.log)
```µcad,multi_line
use std::print;
print("Hello, µcad standard library!");
```