How to handle Null value

[landview]

My formula is:
whileprintingrecords;
Numbervar X := x + {@est_hrs_per_task}

when I run the report I get the Error as:
{@est_hrs_per_task}:<null>
var X:0
Exp x:0

I want to get zero when {@est_hrs_per_task} is Null. So how can solve this problem?

 

[briangriffin]

This would probably be handled better in the {@est_hrs_per_task} formula, but it would look very similar to how you would handle it in this formula:

whileprintingrecords;
Numbervar X;
Numbervar Y;
if isnull({@est_hrs_per_task}) then Y := 0 else Y := {@est_hrs_per_task};
X := x + Y;
X