What is full form of printf function?

[Mahesh Baria]

what is full form of printf function?

[horace1]

are you asking for the details of printf() and the conversion specifications, etc? if so look at

http://www.cplusplus.com/reference/clibrary/cstdio/printf/

[weaknessforcats]

Also check your compiler. Many compilers are distributed with the full source code of the C language. You may have this code on your disc already.