How do I change the number of decimal places iOS?

Question

I have a simple calculator app and I want it to be so that if the answer requires no decimal places, there are none, just whole numbers. If the answer was 2, I don\'t want i

Answer 1

I had the same problem. This is the code snippet that solved it (looks a lot like Caleb's solution, but that one didn't work for me, so I had to add an extra line):

NSNumberFormatter *numberFormatter = [[NSNumberFormatter alloc] init];
numberFormatter.numberStyle = kCFNumberFormatterDecimalStyle;
numberFormatter.maximumFractionDigits = 20;
numberFormatter.minimumFractionDigits = 0;

NSNumber *number = [[NSNumber alloc]init];
NSString *numberString = [numberFormatter stringFromNumber:number];

We can use another numberStyle and override its basic appearance, setting desired properties of an NSNumberFormatter.

Answer 2

The easiest way is just use [[NSNumber numberWithFloat:] stringValue]

Example:

float someFloatValue;
NSString floatWithoutZeroes = [[NSNumber numberWithFloat:someFloatValue] stringValue];

Answer 3

If we use %g in place of %f will truncate all zeros after decimal point.

For example

[NSString stringWithFormat:@"%g", 1.201000];

Output

1.201

Answer 4

One way is to use NSNumberFormatter to format your result instead of NSString's -stringWithFormat::

NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setMaximumFractionDigits:requiredDigits];
[formatter setMinimumFractionDigits:0];
NSString *result = [formatter stringFromNumber:[NSNumber numberWithFloat:currentNumber];

Answer 5

This should work

NSString *result = [@(currentNumber) description];