How to round a float value with button - iphone

Question

Okay so I'm trying to get my values rounded up to the nearest whole number with an IBAction.
So 1.88 -> 2.00 ,
11.40 -> 12.00 ,
111.01 -> 112.00, etc.
-
-(IBAction)roundUp:(id)sender
{
float floatRoundValue=lblTotalRound.text floatValue];
ceilf(floatRoundValue);
NSString *stringRoundValue = [NSString stringWithFormat:#"%1.0f", floatRoundValue];
lblTotalRound.text=stringRoundValue;
}
That's what I got. But it's still rounding down below .5 and to the nearest integer
(Ex. 1.19 -> 1 , i need 1.19 -> 2.00).
I've tried %1.2f but the value doesnt change at all.
What am I doing wrong?

Answer 1

ceilf doesn't modify the value you pass in. It returns a modified value.
floatRoundValue = ceilf(floatRoundValue);

Answer 2

ceilf is a function that returns a value (https://developer.apple.com/library/mac/#documentation/Darwin/Reference/Manpages/man3/ceil.3.html) , you simply need to change that line to the following.
floatRoundValue = ceilf(floatRoundValue);
So the complete code would in your case it would be something like this.
-(IBAction)roundUp:(id)sender
{
float floatRoundValue=lblTotalRound.text floatValue];
floatRoundValue = ceilf(floatRoundValue);
NSString *stringRoundValue = [NSString stringWithFormat:#"%1.0f", floatRoundValue];
lblTotalRound.text=stringRoundValue;
}

Answer 3

If you need to have a $ sign before :
-(IBAction)roundUp:(id)sender
{
float floatRoundValue=(lblTotalRound.text floatValue];
floatRoundValue = ceilf(floatRoundValue);
NSString *stringRoundValue = [NSString stringWithFormat:#"$%1.0f", floatRoundValue];
lblTotalRound.text=stringRoundValue;
}
NSString Class Reference