Python Built-In Functions Table Of Contents: What Is A Built-In Function? Different Built-In Functions. (1) What Is A Built-In Function? A built-in function is a function that is already available in a programming language, application, or another tool that can be accessed by end users. The end user can directly call the function to use it. But you must know how the function works. (2) Different Built-In Function? Python provides total of 69 built-in functions. Let’s discuss them one by one with examples. (1) abs( ) Definition: The abs( ) function returns the absolute value of the specified number. Syntax:

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