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double test1 = 5.58f;
NSString *test2 = @"5.58";
NSLog(@"%@", [NSNumber numberWithDouble:test1]);
NSLog(@"%@", [NSNumber numberWithDouble:[test2 doubleValue]]);
Output:
5.579999923706055
5.58
Why the convert is difference?
Probably due to the fact that 5.58f is a
float, not adouble.