Visit The New, Modern Unix Linux Community

Linux and UNIX Man Pages

Test Your Knowledge in Computers #249
Difficulty: Easy
Senator Albert Gore, Jr. authored the High Performance Computing and Communication Act of 1991, creating what Gore referred to as the information superhighway.
True or False?
Linux & Unix Commands - Search Man Pages

rintf(3m) [opensolaris man page]

rint(3M)						  Mathematical Library Functions						  rint(3M)

NAME
rint, rintf, rintl - round-to-nearest integral value SYNOPSIS
c99 [ flag... ] file... -lm [ library... ] #include <math.h> double rint(double x); float rintf(float x); long double rintl(long double x); DESCRIPTION
These functions return the integral value (represented as a double) nearest x in the direction of the current rounding mode. If the current rounding mode rounds toward negative infinity, rint() is equivalent to floor(3M). If the current rounding mode rounds toward positive infinity, rint() is equivalent to ceil(3M). These functions differ from the nearbyint(3M), nearbyintf(), and nearbyintl() functions only in that they might raise the inexact floating- point exception if the result differs in value from the argument. RETURN VALUES
Upon successful completion, these functions return the integer (represented as a double precision number) nearest x in the direction of the current rounding mode. If x is NaN, a NaN is returned. If x is +-0 or +-Inf, x is returned. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
abs(3C), ceil(3M), feclearexcept(3M), fetestexcept(3M), floor(3M), isnan(3M), math.h(3HEAD), nearbyint(3M), attributes(5), standards(5) SunOS 5.11 12 Jul 2006 rint(3M)

Check Out this Related Man Page

RINT(3P)						     POSIX Programmer's Manual							  RINT(3P)

PROLOG
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the correspond- ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux. NAME
rint, rintf, rintl - round-to-nearest integral value SYNOPSIS
#include <math.h> double rint(double x); float rintf(float x); long double rintl(long double x); DESCRIPTION
These functions shall return the integral value (represented as a double) nearest x in the direction of the current rounding mode. The cur- rent rounding mode is implementation-defined. If the current rounding mode rounds toward negative infinity, then rint() shall be equivalent to floor(). If the current rounding mode rounds toward positive infinity, then rint() shall be equivalent to ceil(). These functions differ from the nearbyint(), nearbyintf(), and nearbyintl() functions only in that they may raise the inexact floating- point exception if the result differs in value from the argument. An application wishing to check for error situations should set errno to zero and call feclearexcept(FE_ALL_EXCEPT) before calling these functions. On return, if errno is non-zero or fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an error has occurred. RETURN VALUE
Upon successful completion, these functions shall return the integer (represented as a double precision number) nearest x in the direction of the current rounding mode. If x is NaN, a NaN shall be returned. If x is +-0 or +-Inf, x shall be returned. If the correct value would cause overflow, a range error shall occur and rint(), rintf(), and rintl() shall return the value of the macro +-HUGE_VAL, +-HUGE_VALF, and +-HUGE_VALL (with the same sign as x), respectively. ERRORS
These functions shall fail if: Range Error The result would cause an overflow. If the integer expression (math_errhandling & MATH_ERRNO) is non-zero, then errno shall be set to [ERANGE]. If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, then the overflow floating-point exception shall be raised. The following sections are informative. EXAMPLES
None. APPLICATION USAGE
On error, the expressions (math_errhandling & MATH_ERRNO) and (math_errhandling & MATH_ERREXCEPT) are independent of each other, but at least one of them must be non-zero. RATIONALE
None. FUTURE DIRECTIONS
None. SEE ALSO
abs(), ceil(), feclearexcept(), fetestexcept(), floor(), isnan(), nearbyint(), the Base Definitions volume of IEEE Std 1003.1-2001, Section 4.18, Treatment of Error Conditions for Mathematical Functions, <math.h> COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol- ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html . IEEE
/The Open Group 2003 RINT(3P)

Featured Tech Videos