limit in calculus

In calculus, a limit is a number that a function "approaches" as the input value gets closer and closer to a certain value. For example, if you have a function that gives you the number 3 when you put in any number over 2, the limit of this function as the input value approaches 2 is 3. This means that no matter what number you put in that is closer and closer to 2, the output of the function will always be 3.