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To inline a function, use the keyword inline before the function name and create the function before making any calls to it. If the declared function is longer than one line, the compiler can ignore the inline qualifier.

When the function definitions are short and the functions are called multiple times in a program, inline functions are typically employed. The time it takes to transfer control of the program from the calling function to the definition of the called function is reduced when inline functions are used.

In C++, the inline function is mostly used to save memory. When the function is called, the tasks, such as relocating to the calling function, take a long time to complete.

In the C++ programming language, the inline function is a strong notion. It lengthens the time it takes for a software to run. Inline function is a compiler request and an optimization technique used by the compiler. Inline functions are called at compile time, hence the answer is correct.

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