Hi,

Input variable is variable that get value when you call your Screen/Client Action/Server Action. You must assign this value by yourself (and depend whether it is mandatory or not, this can be empty).

Local variable is variable that you use to keep value on the Screen/Client Action/Server Action. This can modified by logic and not assigned when you call the Screen/Client Action/Server Action.

Hi Cyrus Gamboa,

• Use Of Input Variables
   Whenever you need any input in the current Screen or Action from previous Screen or Action or if you need some values from the screen in Screen Actions Input Variables will be used.
  For Example:-   In the Image below i want something from the previous destination on the current screen. For that i will use input parameter.
  

In the image given below i want to have input in the screen client action so for that i have take an input from screen.

For server action, if i want something from outside the server action i need a input parameter that will take the values from the place where it is used.

Now, For Local Variables understand it like this that it is having a defined scope.Let's say if we have a Screen and we have a local variable so it is just used inside the screen only if screen is destroyed than local variable is destroyed. Same goes with client and server action local variable inside those will have only defined scope they will be only accessed within the actions. we cannot use them to get data from outside or send data from outside the action from the actions or screen.

Hope this helps you in understanding the concept.

Thanks

Hi Cyrus,

Local Variable - used to store data temporarily within the scope of a screen, or action. Typically used for intermediate calculations, storing user inputs, or any data manipulation within the context of a specific operation. They have a specific data type and can be assigned values dynamically during runtime.

Input parameters - used to pass data into a screen, or action from its parent or from another screen, or action.

Output parameters - used to return data from a action to its parent or to another action. They are commonly used to pass back results of operations, or any other output produced by a component.

Please do refer this Outsytems Documentation for better understanding.

Regards,
NK.

The abstraction is like this:

Think Screen, Client Action, and Server Action each as a House. Input parameter is a box used to send food (value put in the input parameter) into the house. Inside the house, the food can be processes further using local variable, say it Microwave - and the once it is hot, you can send out that 'hot food' put in same/another box (output parameter) to anyone who needs it outside the house.

regards 

Hello Guys, Thank you so much for your inputs, I will try to apply these on future exercises. Hopefully I won't get confused again. Because sometimes I mistakenly used input parameter instead of local variable and vice versa specially when I work on a single screen.