scanf() is a predefined function in______header file.*1 pointstdlib. hctype. hstdio. hdstdarg. h

Identifying the Correct Header File

To answer this question, we need to identify where the scanf() function is defined.

1. Understanding the Context:

   • scanf() is a standard input function in C language used for reading formatted input from the keyboard.

2. Reviewing Common C Header Files:

   • stdlib.h: This header file includes functions for memory allocation, process control, conversions, and other utilities.
   • ctype.h: This file contains functions for character handling.
   • stdio.h: This header file includes functions for standard input and output, including printf() and scanf().
   • stdarg.h: This file is used for handling variable-length argument lists.

3. Conclusion:

   • The function scanf() is declared in the stdio.h header file.

Final Answer

scanf() is a predefined function in stdio.h header file.