Evaluation of limits is the basic topic in Calculus. While evaluating the limit of the function nearer to the given point help us to determine the value of the function at the given point. This will help us to determine the y-co-ordinate of the graph at the given point. In evaluation of limits we have several methods, like by direct substitution, removal of holes, evaluating the limit as x tends to positive or negative infinity, evaluation of trigonometric functions for the given real value in terms of $\pi$. Evaluation of limits is very much useful in determining the continuity of the function or the graph of the function.