Common mathematical functions

 

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Common mathematical functions

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Type-generic math

 

Common mathematical functions

Functions
Basic operations
abslabsllabsimaxabs (C99) fabs divldivlldivimaxdiv (C99) fmod	remainder (C99) remquo (C99) fma (C99) fmax (C99) fmin (C99) fdim (C99) nannanfnanl (C99)(C99)(C99)
Exponential functions
exp exp2 (C99) expm1 (C99)	log log10 log1p (C99) log2 (C99)
Power functions
sqrt cbrt (C99)	hypot (C99) pow
Trigonometric and hyperbolic functions
sin cos tan asin acos atan atan2	sinh cosh tanh asinh (C99) acosh (C99) atanh (C99)
Error and gamma functions
erf (C99) erfc (C99)	lgamma (C99) tgamma (C99)
Nearest integer floating point operations
ceil floor roundlroundllround (C99)(C99)(C99)	trunc (C99) nearbyint (C99) rintlrintllrint (C99)(C99)(C99)
Floating point manipulation functions
ldexp scalbnscalbln (C99)(C99) ilogb (C99) logb (C99)	frexp modf nextafternexttoward (C99)(C99) copysign (C99)
Classification
fpclassify (C99)
isfinite (C99)
isinf (C99)
isnan (C99)
isnormal (C99)
signbit (C99)
Macro constants
HUGE_VALFHUGE_VALHUGE_VALL (C99)(C99)	FP_NORMALFP_SUBNORMALFP_ZEROFP_INFINITEFP_NAN (C99)(C99)(C99)(C99)(C99)

 

Functions

Defined in header <math.h>
Basic operations
abslabsllabsimaxabs (C99)	computes absolute value of an integral value (|x|) (function)
fabs	absolute value of a floating point value (|x|) (function)
divldivlldivimaxdiv (C99)	the quotient and remainder of integer division (function)
fmod	remainder of the floating point division operation (function)
remainder (C99)	signed remainder of the division operation (function)
remquo (C99)	signed remainder as well as the three last bits of the division operation (function)
fma (C99)	fused multiply-add operation (function)
fmax (C99)	larger of two floating point values (function)
fmin (C99)	smaller of two floating point values (function)
fdim (C99)	positive difference of two floating point values (max(0, x-y)) (function)
nannanfnanl (C99)(C99)(C99)	not-a-number (NaN) (function)
Exponential functions
exp	returns e raised to the given power (ex) (function)
exp2 (C99)	returns 2 raised to the given power (2x) (function)
expm1 (C99)	returns e raised to the given power, minus one (ex-1) (function)
log	computes natural (base e) logarithm (to base e) (ln(x)) (function)
log10	computes common (base 10) logarithm (log10(x)) (function)
log1p (C99)	natural logarithm (to base e) of 1 plus the given number (function)
log2 (C99)	base 2 logarithm of the given number (function)
Power functions
sqrt	computes square root (√x) (function)
cbrt (C99)	computes cubic root (3√x) (function)
hypot (C99)	computes square root of the sum of the squares of two given numbers (√x2 +y2 ) (function)
pow	raises a number to the given power (xy) (function)
Trigonometric functions
sin	computes sine (sin(x)) (function)
cos	computes cosine (cos(x)) (function)
tan	computes tangent (tan(x)) (function)
asin	computes arc sine (arcsin(x)) (function)
acos	computes arc cosine (arccos(x)) (function)
atan	computes arc tangent (arctan(x)) (function)
atan2	arc tangent, using signs to determine quadrants (function)
Hyperbolic functions
sinh	computes hyperbolic sine (sh(x)) (function)
cosh	computes hyperbolic cosine (ch(x)) (function)
tanh	hyperbolic tangent (function)
asinh (C99)	area hyperbolic sine (function)
acosh (C99)	area hyperbolic cosine (function)
atanh (C99)	area hyperbolic tangent (function)
Error and gamma functions
erf (C99)	error function (function)
erfc (C99)	complementary error function (function)
lgamma (C99)	natural logarithm of the gamma function (function)
tgamma (C99)	gamma function (function)
Nearest integer floating point operations
ceil	nearest integer not less than the given value (function)
floor	nearest integer not greater than the given value (function)
trunc (C99)	nearest integer not greater in magnitude than the given value (function)
roundlroundllround (C99)(C99)(C99)	nearest integer, rounding away from zero in halfway cases (function)
nearbyint (C99)	nearest integer using current rounding mode (function)
rintlrintllrint (C99)(C99)(C99)	nearest integer using current rounding mode with exception if the result differs (function)
Floating point manipulation functions
frexp	decomposes a number into significand and a power of 2 (function)
ldexp	multiplies a number by 2 raised to a power (function)
modf	decomposes a number into integer and fractional parts (function)
scalbnscalbln (C99)(C99)	multiplies a number by FLT_RADIX raised to a power (function)
ilogb (C99)	extracts exponent of the number (function)
logb (C99)	extracts exponent of the number (function)
nextafternexttoward (C99)(C99)	next representable floating point value towards the given value (function)
copysign (C99)	copies the sign of a floating point value (function)
Classification
fpclassify (C99)	categorizes the given floating point value (function)
isfinite (C99)	checks if the given number has finite value (function)
isinf (C99)	checks if the given number is infinite (function)
isnan (C99)	checks if the given number is NaN (function)
isnormal (C99)	checks if the given number is normal (function)
signbit (C99)	checks if the given number is negative (function)

Macro constants

Defined in header <math.h>
HUGE_VALFHUGE_VALHUGE_VALL (C99)(C99)	indicates value too big to be representable (infinity) by float, double and long double respectively (macro constant)
Classification
FP_NORMALFP_SUBNORMALFP_ZEROFP_INFINITYFP_NAN (C99)(C99)(C99)(C99)(C99)	indicates a floating-point category (macro constant)