What is difference between user defined function and library function ?

The user-defined functions are defined by a user as per its own requirement and library functions come with compiler.

Library Function User Defined Functions
  • LF(library functions) are Predefined functions.
  • UDF(user defined functions) are the function which r created by user as per his own requirements.
  • UDF are part of the program which compile runtime
  • LF are part of header file
    (such as MATH.h) which is called runtime.
  • In UDF the name of function id decided by user
  • in LF it is given by developers.
  • in UDF name of function can be changed any time
  • LF Name of function can't be
    changed.
Example : SIN, COS, Power Example : fibo, mergeme

40 comments:

  1. COME TO KNOW THIS IN DEEP May 27, 2012 at 10:25 PM

    thanks

    ReplyDelete
  2. UnknownAugust 13, 2013 at 6:08 AM

    THANKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKKS BRO....

    ReplyDelete
  3. UnknownNovember 10, 2013 at 1:08 AM

    thankuuuuuuuuuuuuuuuu very much ....really u solve my problem

    ReplyDelete
  4. UnknownOctober 6, 2014 at 10:58 AM

    it is easy to understood...thnks

    ReplyDelete
  5. UnknownMarch 5, 2016 at 2:47 AM

    It is very useful and very very easy.
    THANK YOU very much for the answer.

    ReplyDelete
  6. UnknownMay 2, 2016 at 3:54 AM

    very.........easy to understood..but u have written the point of user defined function under the section library function..from line 2..however it can be ignored

    ReplyDelete
  7. Prashant cheetryApril 11, 2017 at 9:53 PM

    😁😁😁😂🖕🖕🖕🖕

    ReplyDelete
  8. UnknownSeptember 28, 2017 at 10:20 PM

    Finally simple way to understand it

    ReplyDelete
  9. UnknownOctober 13, 2017 at 11:42 AM

    Is main (void) is user or library defined

    ReplyDelete
  10. UnknownNovember 28, 2017 at 10:49 AM

    it is opposite

    ReplyDelete
  11. UnknownNovember 28, 2017 at 10:50 AM

    maakichoot

    ReplyDelete
  12. UnknownJuly 22, 2018 at 4:21 AM

    VVVVV USE FULL

    ReplyDelete
  13. UnknownAugust 19, 2018 at 2:18 AM

    nice

    ReplyDelete
  14. UnknownSeptember 5, 2018 at 6:11 PM

    Nice and tqqqq

    ReplyDelete
  15. UnknownSeptember 29, 2018 at 5:02 AM

    This comment has been removed by the author.

    ReplyDelete
  16. UnknownOctober 12, 2018 at 8:21 PM

    Thanks for information

    ReplyDelete
  17. nittech2.blogspot.comOctober 30, 2018 at 2:45 AM

    The first point of LF is write but another point is written as UDF.. what is this????

    ReplyDelete
  18. flowerNovember 28, 2018 at 9:18 PM

    Thanks

    ReplyDelete
  19. UnknownDecember 30, 2018 at 9:53 AM

    Tqs

    ReplyDelete
  20. UnknownJanuary 4, 2019 at 7:18 PM

    It's easy to understanding 👌

    ReplyDelete
  21. UnknownFebruary 6, 2019 at 7:14 PM

    User defined function difference are in library function!!!!!

    ReplyDelete
  22. UnknownFebruary 7, 2019 at 1:58 AM

    Thnks

    ReplyDelete
  23. UnknownFebruary 7, 2019 at 6:48 PM

    Easy but less

    ReplyDelete
  24. UnknownMarch 30, 2019 at 12:08 PM

    easy but it has some mistake .i think Lf and udf funtion points will be opposite

    ReplyDelete
  25. UnknownApril 17, 2019 at 10:22 PM

    Good. .. Make money 💰

    ReplyDelete
  26. UnknownMay 17, 2019 at 10:48 PM

    Thanks bro

    ReplyDelete
  27. Payal VishwakarmaJune 22, 2019 at 12:11 PM

    Its so small answer

    ReplyDelete
  28. UnknownJune 23, 2019 at 7:57 AM

    Thanks bro

    ReplyDelete
  29. Sam HussainJuly 3, 2019 at 11:17 PM

    TQ so much this is very useful

    ReplyDelete
  30. FasihaSeptember 21, 2019 at 10:20 AM

    its easy to learn,thanks!

    ReplyDelete
  31. UnknownSeptember 30, 2019 at 7:17 PM

    It is easy thnqs sir

    ReplyDelete
  32. UnknownDecember 17, 2019 at 11:44 AM

    Thank u bro it helped me lot

    ReplyDelete
  33. UnknownJanuary 9, 2020 at 2:11 PM

    thanks

    ReplyDelete
  34. UnknownJanuary 15, 2020 at 6:40 AM

    they are jumbled

    ReplyDelete
  35. Manoj TharuJanuary 18, 2020 at 4:54 AM

    thank u it helped me alot

    ReplyDelete
  36. UnknownApril 2, 2021 at 4:07 PM

    😂😂😂😂🤙🤙🤙

    ReplyDelete