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User Defined Functions has to be Developed by the user at the time of writing a program like Main() while library defined functions are already defined in the library of C and cannot be further modified like Printf(). Following are the advantages of user-defined function:- 1. It Facilitates top down programming. 2. It can be used by any other program. 3. Length of program can be reduced and makes debugging easier. There are three elements of user-defined function. These elements are as follows:- 1. FUNCTION DEFINITION 2. FUNCTION CALL 3. FUNCTION DECLARATION If you like to continue, click here User defined functions
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