Advantages of Using Inline Variables

• Avoiding ODR: Inline variables are exceptions to ODR, so we can safely define the same variable multiple times in different translation units.
• Avoiding Complex Code: Inline variables simplify the code by removing the use of the workaround methods used to achieve the same functionalities.
• Consistent and Efficient: The inline variable across multiple translation units uses the same memory address making it memory-efficient for specific tasks.

An inline variable in C++ is a variable that is declared using an inline specifier. It is an exception to one definition having multiple definitions across various translation units. Inline variables have an external linkage when not declared as static.