Final answer:
A custom timer is a programming construct used to perform an action after a set amount of time. It can be implemented using functions or libraries in various programming languages, such as JavaScript's setTimeout() function.
Step-by-step explanation:
A custom timer is a programming construct that allows a system to perform a specific action after a predetermined amount of time has passed. In many programming languages, you can create timers using built-in functions or libraries that handle time delays and the execution of code after those delays. For example, in JavaScript, you might use the setTimeout() function to create a timer that executes a function after a set number of milliseconds.
To create a custom timer, the following general steps are typically followed:
- Specify the duration of the timer.
- Define the action to be performed once the timer expires.
- Use a programming function or library to wait for the duration and then execute the action.
This technique is often used in software development for tasks such as delaying the execution of a function, creating countdowns, or polling resources at regular intervals.