How to trim zeros after decimal point

Question

I am trying to trim zeros after a decimal point as below but it's not giving desired result.

trig = [currentVal doubleValue];
trig = trig/100;
NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];
[formatter setMaximumFractionDigits:0];
display.text = [formatter stringFromNumber:[NSNumber numberWithDouble:trig]];

The number is still being displayed without trimming zeros after the decimal point.

Here currentVal is the number I am entering.

For example if i pass "trig" = 123 (Initially "trig" = 123 after doing trig/100 i want to display 1.23 but it is displaying as 1.23000000).

Answer 1

Sometimes the straight C format specifiers do an easier job than the Cocoa formatter classes, and they can be used in the format string for the normal stringWithFormat: message to NSString.

If your requirement is to not show any trailing zeroes, then the "g" format specifier does the job:

float y = 1234.56789f;

NSString *s = [NSString stringWithFormat:@"%g", y];

Notice that there is no precision information, which means that the printf library will remove the trailing zeroes itself.

There is more information in the docs, which refer to IEEE's docs.