ARM_Parameter_2

{
    "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "parameters": {
        "mySecureString": {
            "type": "securestring"
        },
        "myDescription": {
            "type": "string",
            "maxLength": 4,
            "metadata": {
                "description": "This parameter has a max length of 4."
            }
        },
        "myEvironments": {
            "type": "string",
            "allowedValues": [
                "development",
                "test"
            ],
            "metadata": {
                "description": "This string can only contain values: development or test."
            }
        },
        "myPrefix": {
            "type": "string",
            "defaultValue": "[concat('euw-', uniqueString(resourceGroup().id), '-')]",
            "metadata": {
                "description": "This parameter contains a default value"
            }
        }
    }
}