I want same value after converting in to double from NSString iOS

Question

My NSString value is 28.4701278 after converting into double I want same value as 28.4701278

After converting into double, I want same value in double as 28.4701278 — Nazish Ali, Feb 02 '16 at 10:12

score 3 · Answer 1 · answered Feb 02 '16 at 10:20

3

If loss of significance is not acceptable, use NSDecimalNumber instead of double.

answered Feb 02 '16 at 10:20

Siyu Song

score 1 · Answer 2 · answered Feb 02 '16 at 10:12

1

NSString *stringValue = @"28.4701278";
double doubleValue = [stringValue doubleValue];

answered Feb 02 '16 at 10:12

Madan gupta

NSString *stringValue = @"28.4701273"; double doubleValue = [stringValue doubleValue]; the out put will be : 28.470127300000001 – Nazish Ali Feb 02 '16 at 10:15
Not same 28.4701273 – Nazish Ali Feb 02 '16 at 10:16
in my case output is same as above... can share your code where you are using it? – Madan gupta Feb 02 '16 at 10:18
Please show your out put console. – Nazish Ali Feb 02 '16 at 10:29
i think you only need double data structure while performing some mathematical operation and for tht 28.470127300000001 is almost equal to 28.4701273. and if you want to display it anywhere than you can again convert it to string and it will be 28.4701273. for conversion from double to string you can use NSNumberFormatter *fmt = [[NSNumberFormatter alloc] init]; [fmt setPositiveFormat:@"0.#######"]; NSLog(@"%@", [fmt stringFromNumber:[NSNumber numberWithDouble:doubleValue]]); – Madan gupta Feb 02 '16 at 10:38

Anbu.Karthik · Answer 3 · 2016-02-02T10:27:01.537

1

simple try

double finalValue = [@"28.4701278" doubleValue];
NSLog(@"final value ==%f",finalValue);

you get output like

Update

 double finalValue = [@"28.4701273" doubleValue];
 NSLog(@"final value ==%f",finalValue);

I get output like

Edit

use NSDecimalNumber instead of double

 NSDecimalNumber *decimalNum= [NSDecimalNumber decimalNumberWithString:@"28.4701273"];
NSLog(@"final  ==%@",decimalNum);

output is

edited Feb 02 '16 at 10:27

answered Feb 02 '16 at 10:13

Anbu.Karthik

use it @"28.4701273" instead of @"28.4701278" – Nazish Ali Feb 02 '16 at 10:18
bro 3 is missing in your out put. – Nazish Ali Feb 02 '16 at 10:27
@SalmanAli -- check the **Edit** answer bro.. – Anbu.Karthik Feb 02 '16 at 10:29
This is object type not double data type. – Nazish Ali Feb 02 '16 at 10:30

score 1 · Answer 4 · answered Feb 02 '16 at 10:20

1

Try this:

var string = "28.4701278"
var a = Double(string)

answered Feb 02 '16 at 10:20

iAnurag

4 Answers4