How to access variables and change in jenkins?

Question

Jenkins

in the parameters I set a variable, for example name, and then I want to change it in the pipeline, is it possible like that or are they constants?
and I can access variables ${env.PATH} , or just env.PATH , or in which case this ${} syntax

Answer 1

and I can access variables ${env.PATH} , or just env.PATH , or in which case this ${} syntax

https://groovy-lang.org/syntax.html#_string_interp...

in the parameters I set a variable, for example name, and then I want to change it in the pipeline, is it possible like that or are they constants?

Can you give an example of what you want to do?