What is a header file.

Question

Explain to me the relevance of header files.must they be included when starting your c program?

Answer 1

Nyambogai Alex Hello,header file is a file with extension  .h which contains C function declarations and macro definitions to be shared between several source files.

For more info visit this links
https://www.tutorialspoint.com/cprogramming/c_header_files.htm

https://www.google.com/amp/s/www.geeksforgeeks.org/write-header-file-c/amp/