## Article

```catala
declaration scope A:
  context output x content decimal
  context output y content decimal

scope A:
  definition x equals 4.0
  definition y equals 1.0 + (x / 100.0)
  assertion y = 1.04
```



```catala-test-inline
$ catala Typecheck --check-invariants
┌─[RESULT]─
│ All invariant checks passed
└─
┌─[RESULT]─
│ Typechecking successful!
└─
```

```catala-test-inline
$ catala test-scope A
┌─[RESULT]─
│ x = 4.0
│ y = 1.04
└─
```