Answer
See the explanation
Work Step by Step
To define the structure "Dance" as either a Chacha or a Waltz, where a Waltz consists of one or more copies of the pattern:
- Forward diagonal close or
- Backward diagonal close
You can represent this using Backus-Naur Form (BNF) or Extended Backus-Naur Form (EBNF). Here's a textual representation:
```
Dance ::= Chacha | Waltz
Waltz ::= ForwardDiagonalClose+
| BackwardDiagonalClose+
ForwardDiagonalClose ::= "ForwardDiagonalClose"
BackwardDiagonalClose ::= "BackwardDiagonalClose"
Chacha ::= "Chacha"
```
In this representation:
- `Dance` can be either a Chacha or a Waltz.
- `Waltz` is defined as one or more occurrences of either `ForwardDiagonalClose` or `BackwardDiagonalClose`.
- `ForwardDiagonalClose` and `BackwardDiagonalClose` represent the specific dance steps.
- `Chacha` represents the Chacha dance.
You can use this as a starting point to create syntax diagrams using appropriate tools or visualize it according to your requirements.
