Example ARM Template with functions

arm_template_with_functions.json

{
    "$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
    "contentVersion": "1.0.0.0",
    "resources": [
        {
            "apiVersion": "2016-01-01",
            "type": "Microsoft.Storage/storageAccounts",
            "name": "[concat('storage', copyIndex(), uniqueString(resourceGroup().id))]",
            "location": "[resourceGroup().location]",
            "sku": {
                "name": "Standard_LRS"
            },
            "kind": "Storage",
            "properties": {},
            "copy": {
                "name": "storagecopy",
                "count": 5
            }
        }
    ]
}