C++ Math Functions
C++ offers some basic math functions and the required header file to use these functions is <math.h>
Trignometric functions
Method |
Description |
cos(x) |
It computes the cosine of x. |
sin(x) |
It computes the sine of x. |
tan(x) |
It computes the tangent of x. |
acos(x) |
It finds the inverse cosine of x. |
asin(x) |
It finds the inverse sine of x. |
atan(x) |
It finds the inverse tangent of x. |
atan2(x,y) |
It finds the inverse tangent of a coordinate x and y. |
Hyperbolic functions
Method |
Description |
cosh(x) |
It computes the hyperbolic cosine of x. |
sinh(x) |
It computes the hyperbolic sine of x. |
tanh(x) |
It computes the hyperbolic tangent of x. |
acosh(x) |
It finds the arc hyperbolic cosine of x. |
asinh(x) |
It finds the arc hyperbolic sine of x. |
atanh(x) |
It finds the arc hyperbolic tangent of x. |
Exponential functions
Method |
Description |
exp(x) |
It computes the exponential e raised to the power x. |
frexp(value_type x,int* exp) |
It breaks a number into significand and 2 raised to the power exponent. |
Idexp(float x, int e) |
It computes the product of x and 2 raised to the power e. |
log(x) |
It computes the natural logarithm of x. |
log10(x) |
It computes the common logarithm of x. |
modf() |
It breaks a number into an integer and fractional part. |
exp2(x) |
It computes the base 2 exponential of x. |
expm1(x) |
It computes the exponential raised to the power x minus one. |
log1p(x) |
It computes the natural logarithm of x plus one. |
log2(x) |
It computes the base 2 logarithm of x. |
logb(x) |
It computes the logarithm of x. |
scalbn( x, n) |
It computes the product of x and FLT_RADX raised to the power n. |
scalbln( x, n) |
It computes the product of x and FLT_RADX raised to the power n. |
ilogb(x) |
It returns the exponent part of x. |
Floating point manipulation functions
Method |
Description |
copysign(x,y) |
It returns the magnitude of x with the sign of y. |
nextafter(x,y) |
It represents the next representable value of x in the direction of y. |
nexttoward(x,y) |
It represents the next representable value of x in the direction of y. |
Maximum,Minimum and Difference functions
Method |
Description |
fdim(x,y) |
It calculates the positive difference between x and y. |
fmax(x,y) |
It returns the larger number among two numbers x and y. |
fmin() |
It returns the smaller number among two numbers x and y . |
Power functions
Method |
Description |
pow(x,y) |
It computes x raised to the power y. |
sqrt(x) |
It computes the square root of x. |
cbrt(x) |
It computes the cube root of x. |
hypot(x,y) |
It finds the hypotenuse of a right angled triangle. |
Nearest integer operations
Method |
Description |
ceil(x) |
It rounds up the value of x. |
floor(x) |
It rounds down the value of x. |
round(x) |
It rounds off the value of x. |
lround(x) |
It rounds off the value of x and cast to long integer. |
llround(x) |
It rounds off the value of x and cast to long long integer. |
fmod(n,d) |
It computes the remainder of division n/d. |
trunc(x) |
It rounds off the value x towards zero. |
rint(x) |
It rounds off the value of x using rounding mode. |
lrint(x) |
It rounds off the value of x using rounding mode and cast to long integer. |
llrint(x) |
It rounds off the value x and cast to long long integer. |
nearbyint(x) |
It rounds off the value x to a nearby integral value. |
remainder(n,d) |
It computes the remainder of n/d. |
remquo() |
It computes remainder and quotient both. |
Other functions
Method |
Description |
fabs(x) |
It computes the absolute value of x. |
abs(x) |
It computes the absolute value of x. |
fma(x,y,z) |
It computes the expression x*y+z. |
Macro functions
Method |
Description |
fpclassify(x) |
It returns the value of type that matches one of the macro constants. |
isfinite(x) |
It checks whether x is finite or not. |
isinf() |
It checks whether x is infinite or not. |
isnan() |
It checks whether x is nan or not. |
isnormal(x) |
It checks whether x is normal or not. |
signbit(x) |
It checks whether the sign of x is negative or not. |
Comparison macro functions
Error and gamma functions
Method |
Description |
erf(x) |
It computes the error function value of x. |
erfc(x) |
It computes the complementary error function value of x. |
tgamma(x) |
It computes the gamma function value of x. |
lgamma(x) |
It computes the logarithm of a gamma function of x. |
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