Rounding a number when the last digit is 5

[Swati777999]

Rounding the following

QString value= "0.3145675"; 
qDebug()<<"Value after rounding ="<<QString::number(value.toDouble(),'f',m_decimals);  //Output - 0.314567

For such cases , the answer should be 0.314568 as per the rule Keep it EVEN

How can it be achieved?

[kshegunov]

The behavior is correct:
https://www.binaryconvert.com/result_double.html?decimal=048046051049052053054055053

0.3145675 isn't exactly representable.

@Swati777999 said in Rounding a number when the last digit is 5:

How can it be achieved?

By understanding how floating point numbers work and how they are represented.
https://en.wikipedia.org/wiki/Double-precision_floating-point_format