How to dynamically declare variables in Qt?

In Qt, the QVariant class can be used to dynamically define variables. QVariant is a universal data type provided by Qt that can store various different types of data, including basic types and custom types.

Here is an example of dynamically defining a variable of type int:

QVariant myVariable = QVariant::fromValue<int>(42);

In this example, the int value is converted to QVariant type using the QVariant::fromValue() function and assigned to the variable myVariable.

To dynamically define variables of other types, simply replace ‘int’ with the corresponding type. For example, defining a variable of type QString:

QVariant myVariable = QVariant::fromValue<QString>("Hello, World!");