Limiting decimal points to what is needed
double, objective-c
Solution
If you'd like to hard-code the number of decimal places you're after, this would give you two decimal places:
NSLog(@"%.2f", answer);
Read more about format specifiers here:
http://www.cplusplus.com/reference/clibrary/cstdio/printf/
Alternatively, if you'd like to change the number of decimal places on-the-fly, consider using the NSNumberFormatter class:
int maxDigitsAfterDecimal = 3; // here's where you set the dp
NSNumberFormatter * nf = [[NSNumberFormatter alloc] init];
[nf setMaximumFractionDigits:maxDigitsAfterDecimal];
NSString * trimmed = [nf stringFromNumber:[NSNumber numberWithDouble:3.14159]];
NSLog(@"%@", trimmed); // in this case, 3.142
[nf release];
Problem
Possible Duplicate: Rounding numbers in Objective-C objective -C : how to truncate extra zero in float? Correcting floating point numbers In Objective C, I have a double which receives the answer to a calculation as shown: ``` double answer = a / b; ``` The double variable can sometimes be a whole integer but can also be a fraction e.g. ``` NSLog(@"%f", answer) ``` This can return 2.000000 or 5.142394 or 2.142000. I was wondering if there was a way to edit the decimal places so that the trailing 0's are not visible for example: 2.000000 would be 2 5.142394 would be 5.142394 2.142000 would be 2.142 How can this be done?