You are deploying three Azure VMS with an Azure Resource Manager (ARM) template. Which ARM function implements the iteration loop to provision the right number of VMs?

{
    "type": "Microsoft.Compute/virtualMachines",
    "name": "[concat('myvm', `______`)]",
    "apiVersion": "2016-04-30-preview",
    "location": "[parameters('location')]",
    "copy": " ",
    "name": "virtualMachineLoop",
    "count": "[parameters('numberOfInstances')]"
},