Question
Difference between parameters and localvariable
Can someone explain me the difference between parameters and local variable with example?
Hi,
I am believing that you have Idea about c/java. I can explain in that way.
Example of a function in C/Java
int add( int a, int b ) {
int sum;
sum = a + b;
return sum;
}
So if you observe the above function ; it is expecting a and b values(Parameters of mentioned function). and inside the function there is another variable which is sum.
If we compare same thing with pega ; a and b variables are like parameters (created for reusability by passing values dynamically). And sum is like Local variable. The scope of that variable is up to that function (Local to that function). In pega the scope of local variable is up to the rule. It will be useful for manipulations within the steps of the rule. There is no scope for local variables after out of the rule.
Hi Sarithaa,
As per my understanding, if we consider the usage of Parameters and Local Variables in Activities:
- Parameters are being used as the input/output of an activity
- Local variables can't be passed as input to activity
- Parameters and local variable are available in all the steps of an activity
- Local variable can be used to store the intermediate value among the steps of an activity which wont be used as an input/output of an activity. For example, in step 1 you have a java step where you are storing the boolean local variable value and its being used in another non-java step.
Hope this information might be helpful to you.
Regards
Mahesh
There is quite a bit of detail in the following help topic:
Activity form Completing the Parameters tab
In short though, parameters can be passed in and out of an activity, but local variables are just used as temporary values in the activity and do not appear on the parameter page.