What is CONSTANT and use of Constant?

[Sid_Takali]

I'm new in servicenow and trying to educate myself. I wants to know What is CONSTANT and what is the use of Constant?

Thanks!

[Sandeep Rajput]

Constant: A constant in ServiceNow is a variable whose value never changes after the initialisation. 

There are two ways to define constant within ServiceNow.

1. Using properties: Define a property key value pair within System property and use its value within your code.

2. Create a Script Include: Create a separate include containing your constant variables (misnomer) and use it across your business rules and script includes.

Hope this helps.