Contents
Index
_  A B C D E F G H I J L M N O P R S T U V W X Y

_

_IEEE_
Mathematical functions ('math.h')
_LIB_VERSION
Mathematical functions ('math.h')
_POSIX_
Mathematical functions ('math.h')
_SVID_
Mathematical functions ('math.h')
_XOPEN_
Mathematical functions ('math.h')
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A

absolute value (magnitude)
fabs, fabsf[absolute value (magnitude)]
acos
acos, acosf[arc cosine]
acos, acosf[arc cosine]
acos, acosf[arc cosine]
acosh
acosh, acoshf[inverse hyperbolic cosine]
acosh, acoshf[inverse hyperbolic cosine]
acosh, acoshf[inverse hyperbolic cosine]
acoshf
acosh, acoshf[inverse hyperbolic cosine]
alternative declarations
Mathematical functions ('math.h')
applications in engineering and physics
jN, jNf, yN, yNf[Bessel functions]
arc cosine
acos, acosf[arc cosine]
arc sine
asin, asinf[arc sine]
arc tangent
atan, atanf[arc tangent]
atan2, atan2f[arc tangent of y/x]
arc tangent of y/x
atan2, atan2f[arc tangent of y/x]
arg1
matherr[modifiable math error handler]
arg2
matherr[modifiable math error handler]
asin
asin, asinf[arc sine]
asin, asinf[arc sine]
asin, asinf[arc sine]
asinf
asin, asinf[arc sine]
asinh
asinh, asinhf[inverse hyperbolic sine]
asinh, asinhf[inverse hyperbolic sine]
asinh, asinhf[inverse hyperbolic sine]
asinhf
asinh, asinhf[inverse hyperbolic sine]
atan
atan, atanf[arc tangent]
atan, atanf[arc tangent]
atan, atanf[arc tangent]
atan2
atan2, atan2f[arc tangent of y/x]
atan2, atan2f[arc tangent of y/x]
atan2, atan2f[arc tangent of y/x]
atan2f
atan2, atan2f[arc tangent of y/x]
atanf
atan, atanf[arc tangent]
atanh
atanh, atanhf[inverse hyperbolic tangent]
atanh, atanhf[inverse hyperbolic tangent]
atanh, atanhf[inverse hyperbolic tangent]
atanhf
atanh, atanhf[inverse hyperbolic tangent]
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B

base 10 logarithm
log10, log10f[base 10 logarithms]
Bessel functions
jN, jNf, yN, yNf[Bessel functions]
bit representation
fabs, fabsf[absolute value (magnitude)]
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C

Cartesian coordinates
hypot, hypotf[distance from origin]
cbrt
cbrt, cbrtf[cube root]
cbrt, cbrtf[cube root]
cbrt, cbrtf[cube root]
cbrtf
cbrt, cbrtf[cube root]
ceil
floor, floorf, ceil, ceilf[floor and ceiling]
ceilf
floor, floorf, ceil, ceilf[floor and ceiling]
ceiling function
floor, floorf, ceil, ceilf[floor and ceiling]
copysign
copysign, copysignf[sign of y, magnitude of x]
copysign, copysignf[sign of y, magnitude of x]
copysign, copysignf[sign of y, magnitude of x]
copysignf
copysign, copysignf[sign of y, magnitude of x]
cos
sin, sinf, cos, cosf[sine or cosine]
cosf
sin, sinf, cos, cosf[sine or cosine]
cosh
cosh, coshf[hyperbolic cosine]
cosh, coshf[hyperbolic cosine]
cosh, coshf[hyperbolic cosine]
coshf
cosh, coshf[hyperbolic cosine]
cosine
sin, sinf, cos, cosf[sine or cosine]
cube root
cbrt, cbrtf[cube root]
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D

distance from origin
hypot, hypotf[distance from origin]
DOMAIN
matherr[modifiable math error handler]
DOMAIN error
Mathematical functions ('math.h')
double precision number
nextafter, nextafterf[get next number]
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E

e, logarithm
log, logf[natural logarithms]
exp, expf[exponential]
expm1, expm1f[exponential minus 1]
EDOM
sqrt, sqrtf[positive square root]
engineering
jN, jNf, yN, yNf[Bessel functions]
ERANGE
hypot, hypotf[distance from origin]
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
sinh, sinhf[hyperbolic sine]
ldexp, ldexpf[load exponent]
cosh, coshf[hyperbolic cosine]
erf
erf, erff, erfc, erfcf[error function]
erf, erff, erfc, erfcf[error function]
erf, erff, erfc, erfcf[error function]
erfc
erf, erff, erfc, erfcf[error function]
erfcf
erf, erff, erfc, erfcf[error function]
erff
erf, erff, erfc, erfcf[error function]
err
matherr[modifiable math error handler]
errno
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
matherr[modifiable math error handler]
Reentrancy properties of libm
log, logf[natural logarithms]
error function
erf, erff, erfc, erfcf[error function]
error generation
matherr[modifiable math error handler]
error handlers
Mathematical functions ('math.h')
Euclidean distance
hypot, hypotf[distance from origin]
exception structure, defined
matherr[modifiable math error handler]
exp
exp, expf[exponential]
exp, expf[exponential]
exp, expf[exponential]
expf
exp, expf[exponential]
expm1
expm1, expm1f[exponential minus 1]
expm1, expm1f[exponential minus 1]
expm1, expm1f[exponential minus 1]
expm1f
expm1, expm1f[exponential minus 1]
exponent loading
ldexp, ldexpf[load exponent]
exponential
pow, powf[x to the power y]
scalbn, scalbnf[scale by integer]
exponentials
expm1, expm1f[exponential minus 1]
exp, expf[exponential]
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F

fabs
fabs, fabsf[absolute value (magnitude)]
fabs, fabsf[absolute value (magnitude)]
fabs, fabsf[absolute value (magnitude)]
fabsf
fabs, fabsf[absolute value (magnitude)]
fastmath.h
Mathematical functions ('math.h')
finite
isnan, isnanf, isinf, isinff, finite, finitef[test for exceptional numbers]
finitef
isnan, isnanf, isinf, isinff, finite, finitef[test for exceptional numbers]
floating point numbers, single precision
isnan, isnanf, isinf, isinff, finite, finitef[test for exceptional numbers]
floating point, exponent
ilogb, ilogbf[get exponent of floating point number]
floating-point remainder
fmod, fmodf[floating-point remainder (modulo)]
floor
floor, floorf, ceil, ceilf[floor and ceiling]
floor function
floor, floorf, ceil, ceilf[floor and ceiling]
floor, floorf, ceil, ceilf[floor and ceiling]
floor, floorf, ceil, ceilf[floor and ceiling]
floorf
floor, floorf, ceil, ceilf[floor and ceiling]
fmod
fmod, fmodf[floating-point remainder (modulo)]
fmod, fmodf[floating-point remainder (modulo)]
fmod, fmodf[floating-point remainder (modulo)]
fmodf
fmod, fmodf[floating-point remainder (modulo)]
fputs
Mathematical functions ('math.h')
fractional and integer parts
modf, modff[split fractional and integer parts]
frexp
frexp, frexpf[split floating-point number]
ilogb, ilogbf[get exponent of floating point number]
frexp, frexpf[split floating-point number]
frexp, frexpf[split floating-point number]
frexpf
ilogb, ilogbf[get exponent of floating point number]
frexp, frexpf[split floating-point number]
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G

gamma
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
gamma_r
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
gammaf
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
gammaf_r
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
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H

HUGE_VAL
log, logf[natural logarithms]
cosh, coshf[hyperbolic cosine]
hypot, hypotf[distance from origin]
sinh, sinhf[hyperbolic sine]
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
Mathematical functions ('math.h')
hyperbolic cosine
cosh, coshf[hyperbolic cosine]
hyperbolic sine
sinh, sinhf[hyperbolic sine]
hyperbolic tangent
tanh, tanhf[hyperbolic tangent]
hypot
hypot, hypotf[distance from origin]
hypot, hypotf[distance from origin]
hypot, hypotf[distance from origin]
hypotf
hypot, hypotf[distance from origin]
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I

IEEE
Mathematical functions ('math.h')
nan, nanf[representation of infinity]
IEEE infinity
infinity, infinityf[representation of infinity]
ilogb
ilogb, ilogbf[get exponent of floating point number]
ilogb, ilogbf[get exponent of floating point number]
ilogb, ilogbf[get exponent of floating point number]
ilogbf
ilogb, ilogbf[get exponent of floating point number]
infinity
isnan, isnanf, isinf, isinff, finite, finitef[test for exceptional numbers]
infinity, infinityf[representation of infinity]
infinity representation
Mathematical functions ('math.h')
infinity, infinityf[representation of infinity]
infinity, infinityf[representation of infinity]
infinityf
infinity, infinityf[representation of infinity]
INT_MAX
ilogb, ilogbf[get exponent of floating point number]
inverse hyperbolic cosine
acosh, acoshf[inverse hyperbolic cosine]
inverse hyperbolic sine
asinh, asinhf[inverse hyperbolic sine]
inverse hyperbolic tangent
atanh, atanhf[inverse hyperbolic tangent]
isinf
isnan, isnanf, isinf, isinff, finite, finitef[test for exceptional numbers]
isinff
isnan, isnanf, isinf, isinff, finite, finitef[test for exceptional numbers]
isnan
isnan, isnanf, isinf, isinff, finite, finitef[test for exceptional numbers]
isnan, isnanf, isinf, isinff, finite, finitef[test for exceptional numbers]
isnan, isnanf, isinf, isinff, finite, finitef[test for exceptional numbers]
isnanf
isnan, isnanf, isinf, isinff, finite, finitef[test for exceptional numbers]
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J

jn
jN, jNf, yN, yNf[Bessel functions]
jN, jNf, yN, yNf[Bessel functions]
jN, jNf, yN, yNf[Bessel functions]
jnf
jN, jNf, yN, yNf[Bessel functions]
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L

ldexp
ldexp, ldexpf[load exponent]
ldexp, ldexpf[load exponent]
ldexp, ldexpf[load exponent]
ldexpf
ldexp, ldexpf[load exponent]
lgamma
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
lgamma_r
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
lgammaf
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
lgammaf_r
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
log
log, logf[natural logarithms]
log of 1+x
log1p, log1pf[log of 1 + x]
log, logf[natural logarithms]
log, logf[natural logarithms]
log10
log10, log10f[base 10 logarithms]
log10, log10f[base 10 logarithms]
log10, log10f[base 10 logarithms]
log10f
log10, log10f[base 10 logarithms]
log1p
log1p, log1pf[log of 1 + x]
log1p, log1pf[log of 1 + x]
log1p, log1pf[log of 1 + x]
log1pf
log1p, log1pf[log of 1 + x]
logarithmic gamma function
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
logf
log, logf[natural logarithms]
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M

magnitude of x
copysign, copysignf[sign of y, magnitude of x]
mantissa
frexp, frexpf[split floating-point number]
math.h
Mathematical functions ('math.h')
matherr[modifiable math error handler]
Mathematical functions ('math.h')
Mathematical functions ('math.h')
matherr
matherr[modifiable math error handler]
pow, powf[x to the power y]
Reentrancy properties of libm
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
log, logf[natural logarithms]
Mathematical functions ('math.h')
cosh, coshf[hyperbolic cosine]
sqrt, sqrtf[positive square root]
matherr[modifiable math error handler]
matherr[modifiable math error handler]
modf
modf, modff[split fractional and integer parts]
modf, modff[split fractional and integer parts]
modf, modff[split fractional and integer parts]
modff
modf, modff[split fractional and integer parts]
modulo
fmod, fmodf[floating-point remainder (modulo)]
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N

name
matherr[modifiable math error handler]
nan
nan, nanf[representation of infinity]
isnan, isnanf, isinf, isinff, finite, finitef[test for exceptional numbers]
nan, nanf[representation of infinity]
nan, nanf[representation of infinity]
nanf
nan, nanf[representation of infinity]
natural logarithms
log, logf[natural logarithms]
natural system of logarithms
expm1, expm1f[exponential minus 1]
nextafter
nextafter, nextafterf[get next number]
nextafter, nextafterf[get next number]
nextafter, nextafterf[get next number]
nextafterf
nextafter, nextafterf[get next number]
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O

overflow
ldexp, ldexpf[load exponent]
matherr[modifiable math error handler]
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P

physics
jN, jNf, yN, yNf[Bessel functions]
PLOSS
matherr[modifiable math error handler]
positive square root
sqrt, sqrtf[positive square root]
POSIX
Mathematical functions ('math.h')
pow
pow, powf[x to the power y]
pow, powf[x to the power y]
pow, powf[x to the power y]
powf
pow, powf[x to the power y]
precision arithmetic
infinity, infinityf[representation of infinity]
nan, nanf[representation of infinity]
precision arithmetic:double
nan, nanf[representation of infinity]
precision arithmetic:single
nan, nanf[representation of infinity]
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R

reentrancy properties of libm
Reentrancy properties of libm
Reentrancy properties of libm
reentrant calls
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
remainder
rint, rintf, remainder, remainderf[round and remainder]
remainderf
rint, rintf, remainder, remainderf[round and remainder]
retval
matherr[modifiable math error handler]
rint
rint, rintf, remainder, remainderf[round and remainder]
rint, rintf, remainder, remainderf[round and remainder]
rint, rintf, remainder, remainderf[round and remainder]
rintf
rint, rintf, remainder, remainderf[round and remainder]
round and remainder
rint, rintf, remainder, remainderf[round and remainder]
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S

scalbn
scalbn, scalbnf[scale by integer]
scalbn, scalbnf[scale by integer]
scalbn, scalbnf[scale by integer]
scalbnf
scalbn, scalbnf[scale by integer]
scale by integer
scalbn, scalbnf[scale by integer]
sign of y
copysign, copysignf[sign of y, magnitude of x]
signgam
gamma, gammaf, lgamma, lgammaf, gamma_r, gammaf_r, lgamma_r, lgammaf_r[logarithmic gamma function]
sin
sin, sinf, cos, cosf[sine or cosine]
sin, sinf, cos, cosf[sine or cosine]
sin, sinf, cos, cosf[sine or cosine]
sine
sin, sinf, cos, cosf[sine or cosine]
sine and cosine
sin, sinf, cos, cosf[sine or cosine]
sinf
sin, sinf, cos, cosf[sine or cosine]
SING
matherr[modifiable math error handler]
single precision number
nextafter, nextafterf[get next number]
sinh
sinh, sinhf[hyperbolic sine]
sinh, sinhf[hyperbolic sine]
sinh, sinhf[hyperbolic sine]
sinhf
sinh, sinhf[hyperbolic sine]
split floating-point number
frexp, frexpf[split floating-point number]
sqrt
sqrt, sqrtf[positive square root]
sqrt, sqrtf[positive square root]
sqrt, sqrtf[positive square root]
sqrtf
sqrt, sqrtf[positive square root]
structure exception
Mathematical functions ('math.h')
SVID
Mathematical functions ('math.h')
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T

tan
tan, tanf[tangent]
tan, tanf[tangent]
tan, tanf[tangent]
tanf
tan, tanf[tangent]
tangent
tan, tanf[tangent]
tanh
tanh, tanhf[hyperbolic tangent]
tanh, tanhf[hyperbolic tangent]
tanh, tanhf[hyperbolic tangent]
tanhf
tanh, tanhf[hyperbolic tangent]
thread safe properties
Reentrancy properties of libm
threads
Mathematical functions ('math.h')
TLOSS
matherr[modifiable math error handler]
type
matherr[modifiable math error handler]
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U

underflow
ldexp, ldexpf[load exponent]
matherr[modifiable math error handler]
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V

variables
Mathematical functions ('math.h')
versions of math routines
Mathematical functions ('math.h')
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W

warning messages
Mathematical functions ('math.h')
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X

X/Open
Mathematical functions ('math.h')
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Y

yn
jN, jNf, yN, yNf[Bessel functions]
ynf
jN, jNf, yN, yNf[Bessel functions]
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