>>> let a = 2
>>> case a:
... of 1: echo "one"
stdin(2, 4) Error: not all cases are covered
>>> case a:
...   of 1: echo "one"
...   of 2: echo "two"
...   default: "def"
...
stdin(3, 4) Error: not all cases are covered
stdin(6, 9) Error: invalid indentation
stdin(6, 9) Error: undeclared identifier: 'default'
stdin(6, 9) Error: undeclared identifier: 'default'