do you need inline for template in C++

No, you do not need the "inline" keyword for templates in C++. Templates are implicitly inline. The "inline" keyword is typically used for function definitions in header files to prevent multiple definitions when the header is included in multiple source files. Templates, being a form of code generation, do not have the same issues with multiple definitions, and thus, the "inline" keyword is not required for template functions.

Templates are expanded at compile-time, and the generated code is inserted directly into the calling code, eliminating the need for a separate function definition. This process is similar to the inline expansion of regular functions, but it happens automatically for templates without the explicit use of the "inline" keyword.

In summary, the "inline" keyword is not necessary for templates in C++, as the compiler automatically handles the inlining of template code during the compilation process.