Create Web APP/App Service

Login-AzureRmAccount
Set-AzureRmContext -SubscriptionId "subid"
$ResourceGroupName='powershelltest'
$Location='Southeast Asia'
$servername='testsqlserver12345'
$webappname='testwebapp12345678911'
$AppServicePlan='testplan'
New-AzureRmWebApp -Name $webappname -Location $Location `
-AppServicePlan $AppServicePlan -ResourceGroupName $ResourceGroupName