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Recap



                          A header file can be defined as a collection of predefined functions which you can use to
                          increase your program productivity and save your programming time.
                          The ctype.h header file contains the definitions of character handling functions.
                          The math.h header file provides several mathematical and trigonometric functions that you
                          can use to perform various mathematical operations.
                          The  stdlib.h  header  file  provides  several  general  purpose  functions  for  dynamic  memory

                          management, random number generation, integer arithmetic, etc.




                                                         Exercise



                  A.   Tick ( ) the correct option.
                       1.  Which of the following functions is used to convert the entered character into uppercase?

                           a.  toupper( )                                  b.  isaplha( )
                           c.  tolower( )                                  d.  isdigit( )
                       2.  Which of the following header files provides functions to handle characters?
                           a.  ctype.h                                     b.  stdlib.h

                           c.  iostream.h                                  d.  math.h
                       3.   Which  of  the  following  functions  returns  the  floating-point  remainder  after  dividing  two
                           fractional numbers?
                           a.  fmod( )                                     b.  sqrt( )

                           c.  pow( )                                      d.  fabs( )
                       4.  Which function returns the absolute value of a number?
                           a.  fabs(a)                                     b.  abs(a)
                           c.  ceil(a)                                     d.  log(a)

                       5.  Which of the following functions is used to terminate the calling process?
                           a.  exit( )                                     b.  abs( )
                           c.  abort( )                                    d.  div( )

                  B.   Write ‘T’ for true and ‘F’ for false.
                       1.  The ceil( ) function returns the value after rounding it up to the nearest integer.   ……………………

                       2.  The isalpha( ) function returns true if the provided character is an uppercase or
                           a lowercase letter.                                                            ……………………
                       3.  The preprocessor directive is used to include a library file in your program.    ……………………
                       4.  The conio.h header file provides standard input and standard output functions.   ……………………

                       5.  The output of the abs(67) function will be -67.                                ……………………




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