Help retrieving values from UIPicker

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hi,
i'm using uipicker, has 2 component , i'm having problem adding 2 values component together.

codes here:
code:
- (void)pickerview:(uipickerview *)pickerview didselectrow:(nsinteger)row incomponent:(nsinteger)component    {  	for (int =0; <2; i++)  	{  		  		double tenth = [arrayno objectatindex:[pickerview selectedrowincomponent:0]];     	  	}  		double oneth = [array2 objectatindex:[pickerview selectedrowincomponent:1]];  	  	double result = [ double oneth + (double tenth * 10) ];   	  }
and have displayed result out on label called testlabel.
 

1) please wrap code in [ code ] [ /code ] (without spaces) tags.

2) arrayno? can assume it's nsarray (given using objectatindex:)? if cannot ever return double: can return object.
 


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