Grundlagen von JSON durch interaktive, schrittweise Tutorials lernen (für Anfänger)

• •Keine besonderen Voraussetzungen, sofort nach Import nutzbar

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        "content": "### Tutorial - What is JSON?\n\nWelcome! This workflow will teach you the basics of JSON, the language that apps and n8n nodes use to exchange information.\n\n**What is JSON?**\nImagine a contact card:\n- **Name:** John Doe\n- **Age:** 30\n- **Has Children:** Yes\n- **Phone Numbers:** [\"555-1234\", \"555-5678\"]\n\n\nJSON is just a way of writing this down so a computer can understand it perfectly.\n\n**How to use this tutorial:**\n1.  Click **\"Execute Workflow\"**.\n2.  Click on each node, one by one, in order.\n3.  Look at the node's output in the panel on the right and read the associated sticky note to understand what's happening."
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        "content": "#### The Heart of JSON: Key & Value\n\nEverything in JSON is built on this pair:\n- A **Key** (the name of the data, always in double quotes `\"`).\n- A **Value** (the data itself).\n\n\n`\"key\": \"value\"`\n\nIn this node's output, you see two key/value pairs. This is the basic building block for everything that follows."
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        "content": "#### Data Type: String\n\nA string is simply **text**.\n- **Syntax:** The text is always enclosed in double quotes `\" \"`.\n\n\nLook at the output: the value of `json_example_string` is the text we defined."
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        "content": "#### Data Type: Number\n\nThis is simply a number. It can be a whole number (integer) like 10, or a decimal (float) like 12.5.\n- **Syntax:** Just write the number directly, **WITHOUT quotes**.\n\n\n`\"age\": 30` (Correct)\n`\"age\": \"30\"` (Incorrect, this is a String!)\n\nThis distinction is crucial for doing math!"
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        "content": "#### Data Type: Boolean\n\nThis is a value that can only be **TRUE** or **FALSE**.\n- **Syntax:** `true` or `false` (always lowercase and **WITHOUT quotes**).\n\n\nThink of it like a light switch: on (`true`) or off (`false`). It's very useful for conditions (If/Then logic)."
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        "content": "#### Data Type: Array\n\nAn array is an **ordered list** of items.\n- **Syntax:** Starts with `[` and ends with `]`. Items are separated by commas.\n\n\nAn array can hold anything: strings, numbers, booleans, and even other arrays or objects!"
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        "content": "#### Data Type: Object (JSON Object)\n\nThis is the main concept! An object is a **collection of key/value pairs**.\n- **Syntax:** Starts with `{` and ends with `}`.\n\n\nThis is what allows us to structure complex data, like our contact card from the beginning. Notice how this object contains all the other data types we've seen!"
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        "content": "#### Data Type: Null\n\nThis special type means \"nothing,\" \"no value,\" or \"empty.\"\n- **Syntax:** `null` (lowercase and **WITHOUT quotes**).\n\n\nIt's different from `0` (which is a number) or `\"\"` (which is an empty string). `null` is the intentional absence of a value."
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        "content": "#### ⭐ THE KEY STEP: Using JSON in n8n!\n\nNow for the magic. How do you use data from a previous node? With **expressions** `{{ }}`.\n\nThis node creates a custom message. Look at the value of the `message` field:\n`Hello, the number from the tutorial is: {{ $('Number').item.json.json_example_integer }}`\n\nIt dynamically pulled the number `10` from the \"Number\" node! This is how you make your nodes talk to each other."
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        "content": "#### 🎓 FINAL EXAM: Putting It All Together\n\nThis last node creates a final object by using expressions to pull data from **all the previous nodes**.\n\nClick on this node and look at the expressions in each field. It's a perfect summary of everything you've learned.\n\n**Congratulations! You now understand the basics of JSON and how to use it in n8n.**"
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