What is Standard Header Files ?

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Prototypes of the library functions are given in several standard header files. For example, stdio.h contains prototypes for printf, scanf, putchar and getchar . Other standard header files are:

  1. assert.h assertions
  2. ctype.h character class tests
  3. float.h system limits for floating point types
  4. limits.h system limits for integral types
  5. math.h mathematical functions
  6. setjmp.h non-local jumps
  7. signal.h signals and error handlingstdarg.h variable length parameter lists
  8. stdlib.h utility functions; number conversions, memory allocation, exit and system , Quick Sort
  9. string.h string functions
  10. time.h date and time functions

To include these standard header files in your code, use the preprocessor directive #include and place angle brackets around the name of the file, e.g.

#include<math.h>

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