## Linux and UNIX Man Pages

Test Your Knowledge in Computers #271
Difficulty: Easy
While working at Bletchley Park, in the first week of June each year Alan Turing would get a bad attack of hay fever, and he would cycle to the office wearing a service gas mask to keep from breathing pollen. In the first week of June each year he would get a bad attack of hay fever, and he would cycle to the office wearing a service gas mask to keep from breathing the pollen.
True or False?

# lroundl(3m) [sunos man page]

```lround(3M)						  Mathematical Library Functions						lround(3M)

NAME
lround, lroundf, lroundl - round to nearest integer value

SYNOPSIS
cc [ flag... ] file... -lm [ library... ]
#include <math.h>

long lround(double x);

long lroundf(float x);

long lroundl(long double x);

DESCRIPTION
These  functions round their argument to the nearest integer value, rounding halfway cases away from zero, regardless of the current round-
ing direction.

RETURN VALUES
Upon successful completion, these functions return the rounded integer value.

If x is NaN, a domain error occurs and an unspecified value is returned.

If x is +Inf, a domain error occurs and an unspecified value is returned.

If x is -Inf, a domain error occurs and an unspecified value is returned.

If the correct value is positive and too large to represent as a long, a domain error occurs and an unspecified value is returned.

If the correct value is negative and too large to represent as a long, a domain error occurs and an unspecified value is returned.

ERRORS
These functions will fail if:

Domain Error    The x argument is NaN or +-Inf, or the correct value is not representable as an integer.

If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, then the  invalid  floating-point  exception	is
raised.

USAGE
An  application	wanting  to  check  for  exceptions should call feclearexcept(FE_ALL_EXCEPT) before calling these functions. On return, if
fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an exception  has  been  raised.  An  application  should
either examine the return value or check the floating point exception flags to detect exceptions.

ATTRIBUTES
See attributes(5) for descriptions of the following attributes:

+-----------------------------+-----------------------------+
|      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
+-----------------------------+-----------------------------+
|Interface Stability	     |Standard			   |
+-----------------------------+-----------------------------+
|MT-Level		     |MT-Safe			   |
+-----------------------------+-----------------------------+

feclearexcept(3M), fetestexcept(3M), llround(3M), math.h(3HEAD), attributes(5), standards(5)

SunOS 5.10							    1 Sep 2002								lround(3M)```

## Check Out this Related Man Page

```lround(3M)						  Mathematical Library Functions						lround(3M)

NAME
lround, lroundf, lroundl - round to nearest integer value

SYNOPSIS
c99 [ flag... ] file... -lm [ library... ]
#include <math.h>

long lround(double x);

long lroundf(float x);

long lroundl(long double x);

DESCRIPTION
These  functions round their argument to the nearest integer value, rounding halfway cases away from zero, regardless of the current round-
ing direction.

RETURN VALUES
Upon successful completion, these functions return the rounded integer value.

If x is NaN, a domain error occurs and an unspecified value is returned.

If x is +Inf, a domain error occurs and an unspecified value is returned.

If x is -Inf, a domain error occurs and an unspecified value is returned.

If the correct value is positive and too large to represent as a long, a domain error occurs and an unspecified value is returned.

If the correct value is negative and too large to represent as a long, a domain error occurs and an unspecified value is returned.

ERRORS
These functions will fail if:

Domain Error    The x argument is NaN or +-Inf, or the correct value is not representable as an integer.

If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, then the  invalid  floating-point  exception	is
raised.

USAGE
An  application	wanting  to  check  for  exceptions should call feclearexcept(FE_ALL_EXCEPT) before calling these functions. On return, if
fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an exception  has  been  raised.  An  application  should
either examine the return value or check the floating point exception flags to detect exceptions.

ATTRIBUTES
See attributes(5) for descriptions of the following attributes:

+-----------------------------+-----------------------------+
|      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
+-----------------------------+-----------------------------+
|Interface Stability	     |Standard			   |
+-----------------------------+-----------------------------+
|MT-Level		     |MT-Safe			   |
+-----------------------------+-----------------------------+