Is it possible to establish if statement inside for loop in qlik sense?

[#1]

I have this scenario that I want to use in expressions. For example;

//Use for statement

for (x=0;x=1;x++) {

//Use if statement

if (effectiveyear<=2015) {

Sum(expressions)

}

}

[Gysbert_Wassenaar]

That makes no sense at all (pardon the pun). What are you trying to calculate? Can you provide a small app with example data that explains what you need?