In mathematics, the limit is a concept that describes the tendency of a succession or a function, as the parameters of that sequence or function approach a particular value. The limit of a function is a fundamental concept of mathematical differential calculus.

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Informally, the fact that a function f has a limit l at point P, it means that the value of F could be as close to L as desired, taking points close enough to P, but P. Reds in actual analysis for functions of a variable, one could make a boundary definition similar to that of a succession boundary, in which, the values that the function takes within an interval are approximated to a fixed point C, regardless of whether it belongs to the function domain.

This could be further extended to functions of several variables or functions in ditinted metric spaces. Informally, it is said that the limit of the function f(x) is L when x tends to C and is written: