Which type of variable is suitable for holding data input from the user in a screen?

The appropriate type of variable for holding data input from the user on a screen is an input variable. Input variables are specifically designed to capture data directly from user interactions within a user interface. They function as a means of storing values that users provide through forms, text fields, or other input elements on the screen. This allows developers to retrieve and manipulate that data subsequently in the application's logic.

Using input variables ensures that the data remains isolated to the context of the user interface, preventing any unintended modifications from other areas of the application. They are designed to be transient, only holding the user input while the screen is active or until the data is processed, making them ideal for screen-level data collection.

In contrast, local variables are used to temporarily hold data within a specific logic block, while global variables retain their values throughout the application's lifecycle but are not specifically tied to user input. Output variables are configured to send data from one screen to another or provide results from processes, but they do not capture user input themselves. Each of these other variable types serves different purposes, thus reinforcing why input variables are the most suitable for this scenario.