Several convenience type definitions are declared: qreal for double or float, uchar for unsigned char, uint for unsigned int, ulong for unsigned long and ushort for unsigned short.

QLocale has a handy way of converting numbers. It's not much more typing than the accepted answer, but is more useful in the case of floats; so I like to do both this way. Here's for an int: int i = 42; QString s = QLocale().toString(i); and here's for a float: float f=42.5; QString s = QLocale().toString(f, 1);

May 19, 2013 · I have a QString in my sources. So I need to convert it to integer without "Kb". I tried Abcd.toInt() but it does not work. QString Abcd = "123.5 Kb"

int QML Value Type. a whole number, e.g. 0, 10, or -20. More... Detailed Description. The int type refers to a whole number, e.g. 0, 10, or -20.. The possible int values range from -2147483648 to 2147483647, although most types will only accept a reduced range (which they mention in their documentation).. Example:

Returns the number of representable floating-point numbers between a and b. This function serves the same purpose as qFloatDistance(float, float), but returns the distance between two double numbers. Since the range is larger than for two float numbers ([-DBL_MAX,DBL_MAX]), the return type is quint64. See also qFuzzyCompare ().

Qt supports many platforms, but what matters is the platform's 64-bit data model (or probably more correctly, the compiler plus platform's data model). Most common 64-bit platforms use 32-bit integers because they implement some form of the LP64 data model.

Mar 16, 2025 · Returns the integer value obtained from the conversion. Example. QString str = "123"; int number = str.toInt(); // number will be 123. How it Works. The QString::toInt() function examines the QString object. It attempts to parse the string as a …

Jul 18, 2017 · int QString::toInt(bool *ok, int base) const { qint64 v = toLongLong(ok, base); if (v < INT_MIN || v > INT_MAX) { if (ok) *ok = false; v = 0; } return v; } and toUInt uint QString::toUInt(bool *ok, int base) const { quint64 v = toULongLong(ok, base); if (v > UINT_MAX) { if (ok) *ok = false; v = 0; } return (uint)v; }

Jun 20, 2020 · How can I convert "int" to "quint8" and "quint8" to "int"? int a = 1; qint8 b=static_cast<qint8>(a); modern C++ has this really annoying warning called "narrowing conversions". you have to limit the range of the input value using bitwise AND 0xff... of whatever size the target is, then do a static_cast<> to the target type.

Sep 13, 2018 · sadly you can not, the standard int may have 2 or 4 bytes depending on the platform/compiler used. but you can ensure, that it is 4 bytes, by using int32_t or qint32