Parameters

param (

    [Parameter(Mandatory=$true)][string]$resourceGroupName,
    [Parameter(Mandatory=$true)][string[]]$vmNames,
    [Parameter(Mandatory=$true)][string]$loadBalancerName
)

• resourceGroupName : Give exiating resource group name.
• vmNames : Give existing VM name.
• loadBalancerName: Give existing Loadbalancer name.

This PS basically use for add loadbalancer into the Virtualmachine.