Use JavaScript language Integers numDonuts and allowance are read from input. A donut costs $3$ dollars.

If numDonuts is less than $5,$ then output "Not enough donuts."

If numDonuts is greater than or equal to $5,$ then assign variable totalCost with the product of numDonuts and $3.$

If totalCost is less than or equal to allowance, then output "Donuts successfully purchased."

Otherwise, output "Not enough money to buy all."

If numDonuts is greater than $21,$ then output "Now out of stock."

Otherwise, output "Item still in stock."

End each output with a newline.