[FIXED] How to compare decimal values

Issue

I have a problem with comparison two decimal values.
I have a text field that contains number like 0.123456 and NSNumber that contains 0.000001.
Maximum fraction digits of both is 6. Minimum - 0
I've tried to do it like that:

NSNumberFormatter *decimalFormatter = [[NSNumberFormatter alloc] init];
[decimalFormatter setNumberStyle: NSNumberFormatterDecimalStyle];
[decimalFormatter setMaximumFractionDigits:6];

double sum = [[decimalFormatter numberFromString:self.summTextField.text] doubleValue];

if (self.minSum != nil) {
    if (sum < [self.minSum doubleValue]) {
        return NO;
    }
}

But i have a problem, that sometimes 0.123456 = 0,123455999... or 0,123456000000...01 For example @0.000001 doubleValue < @0.000001 doubleValue - TRUE.

How can I compare to NSNumber with a fractional part, to be sure that it will be correct?

Thanks in advance.

Solution

You can round your value, if you worried about fractional part... Something like this:

-(double)RoundNormal:(double) value :(int) digit
{
    value = round(value * pow(10, digit));
    return value / pow(10, digit);
}

And then compare it.

Answered By - Konstantin

Answer Checked By - Clifford M. (PHPFixing Volunteer)