[else]

else is a core slot, one of the keywords of the Hyperlambda language, in Hyperlambda, the language of Magic Cloud. Evaluates its child lambda when every preceding [if] and [else-if] condition was false.

• Scope: provides if

Arguments

Required arguments come first, then the optional ones in the order they are declared.

Argument	Type	Required	Description
any node name	lambda	yes	Fallback branch body evaluated when previous conditions fail. Can be repeated.

Constraints

• PreviousSiblingMustBeOneOf: Previous sibling must be one of the listed slot names ([if], [else-if])

Guide: How to use [else]

JSON declaration

This is the complete declaration of else, as the running system describes it. It is also published as slot.json.

JSON declaration

{
  "name": "else",
  "description": "Evaluates its child lambda when every preceding [if] and [else-if] condition was false",
  "signature": {
    "children": {
      "*": {
        "type": "lambda",
        "description": "Fallback branch body evaluated when previous conditions fail",
        "required": true,
        "mode": "ExecutableLambda",
        "cardinality": "OneOrMore",
        "role": "ExecutableBody",
        "evaluation": "EvalSelf",
        "projection": "Self"
      }
    },
    "constraints": [
      {
        "description": "Previous sibling must be one of the listed slot names",
        "values": [
          "if",
          "else-if"
        ],
        "kind": "PreviousSiblingMustBeOneOf"
      }
    ],
    "scope": {
      "provides": "if"
    }
  }
}

---

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