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7.5.4 Mathematical functions

Mathematical functions are as follows.

Table 7.6

Mathematical Functions

Function/Macro Name	Outline
fpclassify [V1.08 or later]	Classifies a floating-point number as NaN, infinite, normal, subnormal or zero (C99)
isfinite [V1.08 or later]	Determines whether a floating-point number has a finite value (zero, subnormal, or normal) (C99)
isinf [V1.08 or later]	Determines whether a floating-point number is an infinity (C99)
isnan [V1.08 or later]	Determines whether a floating-point number is a NaN (C99)
isnormal [V1.08 or later]	Determines whether a floating-point number is normal (neither zero, subnormal, infinite, nor NaN) (C99)
signbit [V1.08 or later]	Determines whether the sign of a floating-point number is negative (C99)
acos	Arc cosine
acosf	Arc cosine
acosl [V1.08 or later]	Arc cosine (C99)
asin	Arc sine
asinf	Arc sine
asinl [V1.08 or later]	Arc sine (C99)
atan	Arc tangent
atanf	Arc tangent
atanl [V1.08 or later]	Arc tangent (C99)
atan2	Arc tangent (y / x)
atan2f	Arc tangent (y / x)
atan2l [V1.08 or later]	Arc tangent (y / x) (C99)
cos	Cosine
cosf	Cosine
cosl [V1.08 or later]	Cosine (C99)
sin	Sine
sinf	Sine
sinl [V1.08 or later]	Sine (C99)
tan	Tangent
tanf	Tangent
tanl [V1.08 or later]	Tangent (C99)
acosh [V1.08 or later]	Arc hyperbolic cosine (C99)
acoshf [V1.08 or later]	Arc hyperbolic cosine (C99)
acoshl [V1.08 or later]	Arc hyperbolic cosine (C99)
asinh [V1.08 or later]	Arc hyperbolic sine (C99)
asinhf [V1.08 or later]	Arc hyperbolic sine (C99)
asinhl [V1.08 or later]	Arc hyperbolic sine (C99)
atanh [V1.08 or later]	Arc hyperbolic tangent (C99)
atanhf [V1.08 or later]	Arc hyperbolic tangent (C99)
atanhl [V1.08 or later]	Arc hyperbolic tangent (C99)
cosh	Hyperbolic cosine
coshf	Hyperbolic cosine
coshl [V1.08 or later]	Hyperbolic cosine (C99)
sinh	Hyperbolic sine
sinhf	Hyperbolic sine
sinhl [V1.08 or later]	Hyperbolic sine (C99)
tanh	Hyperbolic tangent
tanhf	Hyperbolic tangent
tanhl [V1.08 or later]	Hyperbolic tangent (C99)
exp	Exponent function (natural logarithm)
expf	Exponent function (natural logarithm)
expl [V1.08 or later]	Exponent function (natural logarithm) (C99)
frexp	Break a floating-point number into a normalized fraction and an integral power of 2
frexpf	Break a floating-point number into a normalized fraction and an integral power of 2
frexpl [V1.08 or later]	Break a floating-point number into a normalized fraction and an integral power of 2 (C99)
ldexp	Multiply a floating-point number by an integral power of 2
ldexpf	Multiply a floating-point number by an integral power of 2
ldexpl [V1.08 or later]	Multiply a floating-point number by an integral power of 2 (C99)
log	Logarithmic function (natural logarithm)
logf	Logarithmic function (natural logarithm)
logl [V1.08 or later]	Logarithmic function (natural logarithm) (C99)
log10	Logarithmic function (base = 10)
log10f	Logarithmic function (base = 10)
log10l [V1.08 or later]	Logarithmic function (base = 10) (C99)
log1p [V1.08 or later]	Natural logarithm of 1 plus the argument (C99)
log1pf [V1.08 or later]	Natural logarithm of 1 plus the argument (C99)
log1pl [V1.08 or later]	Natural logarithm of 1 plus the argument (C99)
modf	Break a floating-point number into integral and fractional parts
modff	Break a floating-point number into integral and fractional parts
modfl [V1.08 or later]	Break a floating-point number into integral and fractional parts (C99)
scalbn [V1.09 or later]	Multiply a floating-point number by an integral power of FLT_RADIX (C99)
scalbnf [V1.09 or later]	Multiply a floating-point number by an integral power of FLT_RADIX (C99)
scalbnl [V1.09 or later]	Multiply a floating-point number by an integral power of FLT_RADIX (C99)
scalbln [V1.09 or later]	Multiply a floating-point number by an integral power of FLT_RADIX (C99)
scalblnf [V1.09 or later]	Multiply a floating-point number by an integral power of FLT_RADIX (C99)
scalblnl [V1.09 or later]	Multiply a floating-point number by an integral power of FLT_RADIX (C99)
fabs	Absolute value function
fabsf	Absolute value function
fabsl [V1.08 or later]	Absolute value function (C99)
pow	Power function
powf	Power function
powl [V1.08 or later]	Power function (C99)
sqrt	Square root function
sqrtf	Square root function
sqrtl [V1.08 or later]	Square root function (C99)
ceil	The smallest integer value not less than a floating-point number
ceilf	The smallest integer value not less than a floating-point number
ceill [V1.08 or later]	The smallest integer value not less than a floating-point number (C99)
floor	The largest integer value not greater than a floating-point number
floorf	The largest integer value not greater than a floating-point number
floorl [V1.08 or later]	The largest integer value not greater than a floating-point number (C99)
nearbyint [V1.09 or later]	Rounding to an integer value in floating-point format according to the current rounding direction (C99)
nearbyintf [V1.09 or later]	Rounding to an integer value in floating-point format according to the current rounding direction (C99)
nearbyintl [V1.09 or later]	Rounding to an integer value in floating-point format according to the current rounding direction (C99)
rint [V1.09 or later]	Rounding to an integer value in floating-point format according to the current rounding direction (C99)
rintf [V1.09 or later]	Rounding to an integer value in floating-point format according to the current rounding direction (C99)
rintl [V1.09 or later]	Rounding to an integer value in floating-point format according to the current rounding direction (C99)
lrint [V1.09 or later]	Rounding to a long type integer value according to the current rounding direction (C99)
lrintf [V1.09 or later]	Rounding to a long type integer value according to the current rounding direction (C99)
lrintl [V1.09 or later]	Rounding to a long type integer value according to the current rounding direction (C99)
llrint [V1.09 or later]	Rounding to a long long type integer value according to the current rounding direction (C99)
llrintf [V1.09 or later]	Rounding to a long long type integer value according to the current rounding direction (C99)
llrintl [V1.09 or later]	Rounding to a long long type integer value according to the current rounding direction (C99)
round [V1.09 or later]	Rounding to integer value in floating-point format (C99)
roundf [V1.09 or later]	Rounding to integer value in floating-point format (C99)
roundl [V1.09 or later]	Rounding to integer value in floating-point format (C99)
lround [V1.09 or later]	Rounding to a long type integer value (C99)
lroundf [V1.09 or later]	Rounding to a long type integer value (C99)
lroundl [V1.09 or later]	Rounding to a long type integer value (C99)
llround [V1.09 or later]	Rounding to a long long type integer value (C99)
llroundf [V1.09 or later]	Rounding to a long long type integer value (C99)
llroundl [V1.09 or later]	Rounding to a long long type integer value (C99)
trunc [V1.09 or later]	Rounding to truncated integer value (C99)
truncf [V1.09 or later]	Rounding to truncated integer value (C99)
truncl [V1.09 or later]	Rounding to truncated integer value (C99)
fmod	Remainder function
fmodf	Remainder function
fmodl [V1.08 or later]	Remainder function (C99)
copysign [V1.09 or later]	Generates a value consisting of the given absolute value and sign (C99)
copysignf [V1.09 or later]	Generates a value consisting of the given absolute value and sign (C99)
copysignl [V1.09 or later]	Generates a value consisting of the given absolute value and sign (C99)
nan [V1.09 or later]	Convert character string to NaN (C99)
nanf [V1.09 or later]	Convert character string to NaN (C99)
nanl [V1.09 or later]	Convert character string to NaN (C99)
fdim [V1.09 or later]	Calculation of the positive difference (C99)
fdimf [V1.09 or later]	Calculation of the positive difference (C99)
fdiml [V1.09 or later]	Calculation of the positive difference (C99)
fmax [V1.09 or later]	Obtaing the greater value (C99)
fmaxf [V1.09 or later]	Obtaing the greater value (C99)
fmaxl [V1.09 or later]	Obtaing the greater value (C99)
fmin [V1.09 or later]	Obtaing the smaller value (C99)
fminf [V1.09 or later]	Obtaing the smaller value (C99)
fminl [V1.09 or later]	Obtaing the smaller value (C99)
isgreater [V1.09 or later]	Determining whether the first argument is greater than the second argument (C99)
isgreaterequal [V1.09 or later]	Determining whether the first argument is equal to or greater than the second argument (C99)
isless [V1.09 or later]	Determining whether the first argument is smaller than the second argument (C99)
islessequal [V1.09 or later]	Determining whether the first argument is equal to or smaller than the second argument (C99)
islessgreater [V1.09 or later]	Determining whether the first argument is smaller or greater than the second argument (C99)
isunordered [V1.09 or later]	Determining whether the arguments are not ordered (C99)