Convert a double to a QString

Question

I am writing a program in QT  I want to convert a double into a Qstring in C

User · Accepted Answer

Use QString s number method  docs are here    double valueAsDouble   1 2  QString valueAsString   QString  number valueAsDouble

User · Answer

You can use arg    as follow   double dbl   0 25874601  QString str   QString   1   arg dbl     This overcomes the problem of   Fixed precision  at the other functions like  setNum   and number    which will generate random numbers to complete the defined precision

User · Answer

Instead of QString  number   i would use QLocale  toString    so i can get locale aware group seperatores like german  1 234 567 89

User · Answer

Building on  Kristian s answer  I had a desire to display a fixed number of decimal places   That can be accomplished with other arguments in the QString  number      function  For instance  I wanted 3 decimal places   double value   34 0495834  QString strValue   QString  number value   f   3      strValue     34 050    The  f  specifies decimal format notation  more info here  you can also specify scientific notation  and the 3 specifies the precision  number of decimal places    Probably already linked in other answers  but more info about the QString  number function can be found here in the QString documentation

User · Answer

Check out the documentation  Quote      QString provides many functions for   converting numbers into strings and   strings into numbers  See the arg     functions  the setNum   functions  the   number   static functions  and the   toInt    toDouble    and similar   functions

[c++] Convert a double to a QString

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