To declare a variable in C++, which keyword is commonly used?

In C++, the keyword used to declare a variable type is "int," which is a data type that indicates the variable will hold integer values. When declaring a variable, you specify the type first, followed by the variable name. For instance, writing int myVariable; declares a variable named myVariable that can store integer values.

While "var," "declare," and "define" are terms that relate to variable handling or declaration in programming concepts, they are not keywords used in C++ for declaring variables. "var" is commonly associated with JavaScript and other languages, while "define" is typically used in C++ for defining macros with the preprocessor directive #define. Therefore, "int" is the correct and appropriate keyword for declaring integer variables in C++.