whats a local variable code example

Example 1: what is local variable

Local variables are temporary, and only accessible 
in your request scripts. Local variable values are 
scoped to a single request or collection run, and are 
no longer available when the run is complete.

Example 2: defining local variable

Local variables are temporary values you set in your request 
scripts using syntax :

pm.variables.set("variable_key", "variable_value");