"perché no" meaning in Italian

{
  "head_templates": [
    {
      "args": {
        "head": "perché no?"
      },
      "expansion": "perché no?",
      "name": "it-adv"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "Learn Italian: why not?",
          "text": "Imparare l'italiano: perché no?",
          "type": "example"
        }
      ],
      "glosses": [
        "why not?"
      ],
      "id": "en-perché_no-it-adv-iQ4GZt9E",
      "links": [
        [
          "why not?",
          "why not?"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/perˌke‿nˈnɔ/"
    },
    {
      "ipa": "/ˌper.ke‿nˈnɔ/"
    }
  ],
  "word": "perché no"
}

{
  "head_templates": [
    {
      "args": {
        "head": "perché no?"
      },
      "expansion": "perché no?",
      "name": "it-adv"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Italian adverbs",
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian multiword terms",
        "Italian terms with IPA pronunciation",
        "Italian terms with usage examples"
      ],
      "examples": [
        {
          "english": "Learn Italian: why not?",
          "text": "Imparare l'italiano: perché no?",
          "type": "example"
        }
      ],
      "glosses": [
        "why not?"
      ],
      "links": [
        [
          "why not?",
          "why not?"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/perˌke‿nˈnɔ/"
    },
    {
      "ipa": "/ˌper.ke‿nˈnɔ/"
    }
  ],
  "word": "perché no"
}