NAME    [Toc]    [Back]

       hypot, cabs, fabs - Calculate Euclidean distance and absolute
 value

SYNOPSIS    [Toc]    [Back]

       #include <math.h>

       double hypot(
               double x,
               double y ); float hypotf(
               float x,
               float y ); long double hypotl(
               long double x,
               long double y ); double cabs(
               double x,
               double y ); float cabsf(
               float x,
               float y ); long double cabsl(
               long double x,
               long double y ); double fabs(
               double x ); float fabsf(
               float x ); long double fabsl(
               long double x );

LIBRARY    [Toc]    [Back]

       Math Library (libm)

STANDARDS    [Toc]    [Back]

       Interfaces documented on this reference  page  conform  to
       industry standards as follows:

       hypot():  XPG4

       fabs():  XPG4

       Refer to the standards(5) reference page for more information
 about industry standards and associated tags.

DESCRIPTION    [Toc]    [Back]

       The hypot(), hypotf(), and hypotl() functions compute  the
       length  of the hypotenuse of a right triangle, where x and
       y represent the perpendicular sides of the  triangle.  The
       hypot(x,y),  hypotf(x,y)  and  hypotl(x,y)  functions  are
       defined as sqrt(x**2 + y**2).

       The cabs(), cabsf(), and cabsl() functions return the complex
 absolute value of x. The cabs(), cabsf(), and cabsfl)
       functions are defined as  hypot()  and  hypotf(),  respectively.


       The  fabs(),  fabsf(),  and  fabsl() functions compute the
       absolute value of x.

       The  following  table  describes  function   behavior   in
       response to exceptional arguments:







       ----------------------------------------------------------------------------
       Function                        Exceptional Argument          Routine
                                                                     Behavior
       ----------------------------------------------------------------------------
       hypot(), hypotf(), hypotl()     sqrt(x**2 + y**2)>max_float   Overflow
       cabs(), cabsf(), cabsl()        sqrt(x**2 + y**2)>max_float   Overflow
       ----------------------------------------------------------------------------

       The following table lists boundary values  used  by  these
       functions:

       -----------------------------------------------------------------
       Value Name   Data Type   Hexadecimal Value   Decimal Value
       -----------------------------------------------------------------
       max_float    S_FLOAT     7F7FFFFF            3.402823e38
                    T_FLOAT     7FEFFFFFFFFFFFFF    1.7976931348623e308
       -----------------------------------------------------------------




                                                         hypot(3)