When to use header files <math.h> and <conio.h> in c programming?

Answer 1

math.h is for mathematical functions, like sqrt().
conio.h is for input/output functions for Windows console applications, like getch().

Answer 2

Use a proper tag please. Your question is not related to C#.

Answer 3

Please avoid answering non-C# related questions so that they will learn how to use proper tags.

Answer 4

conio.h header use when our output not shown on the screen like getch ();

math.h use when we want to solve some mathematical problems