How to convert QString to float and compare values?

[Gokulnathvc]

I would like to convert QString values to float and then compare them..

I have used toFloat(), toDouble() , but it is not working.

QString version1 = "2.02.01";
QString version 2 = "2.02.02"
if(version1.toFloat() < version2.toFloat())  // just 2 is returned everytime.
{
 
}

QString version1 = "2.02.01";
QString version 2 = "2.02.02"
if(version1.toFloat() < version2.toFloat())  // just 2 is returned everytime.
{
    
}

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How to resolve it???