What do you understand by tail recursion in Scala ?

The programmers face various situations where they need to write codes which are recursive in nature. But when we use the recursive functions, we may face a problem in which the function may eat up all the stack space. So, to overcome this problem, Scala provides this particular feature of tail recursion which optimizes the recursive function. After optimization, these functions do not create a new stack space, instead uses the current function stack space. “@annotation.tailrec” annotation has to be used before defining the function and for the last statement, recursive call can be used. After all this, your function will be compiled successfully or else it will give an error.