Problem Description: Develop a Flowchart on flowgorith

to calculate the factorial of a given number. The user inputs a nonnegative integer, and the program calculates the factorial $(n!)$ of that number using iteration. Remember, the factorial of $0$ is $1.$

Key Elements: Input $($a non$-$negative integer$),$ Iteration $($to calculate factorial$),$ Output $($factorial of the input number$).$