How to add commas to number every 3 digits in Objective C?

Question

If I have a number int aNum = 2000000 how do I format this so that I can display it as the NSString 2,000,000?

Answer 1

Think some as i will get this post looking for sample. So if you are working with number make attention on next params:

setNumberStyle:NSNumberFormatterCurrencyStyle // if you are working with currency

It could be also

setNumberStyle:NSNumberFormatterDecimalStyle

All code is For ARC.

If you are working with Integer and need to get result such as 200,000

int value = 200000;
NSNumberFormatter * formatter = [NSNumberFormatter new];
[formatter setNumberStyle:NSNumberFormatterDecimalStyle];
NSString * newString =  [formatter stringFromNumber:[NSNumber numberWithInteger:value]];

If you are working with Float and need to get result such as 200,000.00

float value = 200000;
NSNumberFormatter * formatter = [NSNumberFormatter new];
[formatter setNumberStyle:NSNumberFormatterDecimalStyle];
[formatter setMaximumFractionDigits:2]; // Set this if you need 2 digits
NSString * newString =  [formatter stringFromNumber:[NSNumber numberWithFloat:value]];

EDIT

To have ability to use different digital separators use NSLocale. Add to code where NSLocale is specified on Locale Identifier:

[formatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"de_DE"]];

or use current local:

[formatter setLocale:[NSLocale currentLocale]];

Answer 2

An easy solution could be this. My answer is almost same like @Nazir's answer but with a small trick.

double current_balance = 2000000.00;

NSNumberFormatter * formatter = [NSNumberFormatter new];
[formatter setNumberStyle:NSNumberFormatterDecimalStyle];
//[formatter setNumberStyle:NSNumberFormatterCurrencyStyle];  //if you want for currency with $ sign
[formatter setMinimumFractionDigits:2]; // Set this if you need 2 digits
[formatter setMaximumFractionDigits:2]; // Set this if you need 2 digits
NSString * currency_format =  [NSString stringWithFormat:@"%@", [formatter stringFromNumber:[NSNumber numberWithDouble:current_balance]]];

Answer 3

For Swift 4.0

let formatter = NumberFormatter()

formatter.numberStyle = .decimal

formatter.minimumFractionDigits = 2

formatter.maximumFractionDigits = 2

let result = formatter.string(from: NSNumber(value: 123456))