C math (math.h) Library
C Math Functions
The <math.h>
library has many functions that allow you to perform mathematical tasks on numbers.
Function | Description |
---|---|
acos(x) | Returns the arccosine of x, in radians |
acosh(x) | Returns the hyperbolic arccosine of x |
asin(x) | Returns the arcsine of x, in radians |
asinh(x) | Returns the hyperbolic arcsine of x |
atan(x) | Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians |
atan2(y, x) | Returns the angle theta from the conversion of rectangular coordinates (x, y) to polar coordinates (r, theta) |
atanh(x) | Returns the hyperbolic arctangent of x |
cbrt(x) | Returns the cube root of x |
ceil(x) | Returns the value of x rounded up to its nearest integer |
copysign(x, y) | Returns the first floating point x with the sign of the second floating point y |
cos(x) | Returns the cosine of x (x is in radians) |
cosh(x) | Returns the hyperbolic cosine of x |
exp(x) | Returns the value of Ex |
exp2(x) | Returns the value of 2x |
expm1(x) | Returns ex-1 |
erf(x) | Returns the value of the error function at x |
erfc(x) | Returns the value of the complementary error function at x |
fabs(x) | Returns the absolute value of x |
fdim(x) | Returns the positive difference between x and y |
floor(x) | Returns the value of x rounded down to its nearest integer |
fma(x, y, z) | Returns x*y+z without losing precision |
fmax(x, y) | Returns the highest value of a floating x and y |
fmin(x, y) | Returns the lowest value of a floating x and y |
fmod(x, y) | Returns the floating point remainder of x/y |
frexp(x, y) | With x expressed as m*2n, returns the value of m (a value between 0.5 and 1.0) and writes the value of n to the memory at the pointer y |
hypot(x, y) | Returns sqrt(x2 +y2) without intermediate overflow or underflow |
ilogb(x) | Returns the integer part of the floating-point base logarithm of x |
ldexp(x, y) | Returns x*2y |
lgamma(x) | Returns the logarithm of the absolute value of the gamma function at x |
llrint(x) | Rounds x to a nearby integer and returns the result as a long long integer |
llround(x) | Rounds x to the nearest integer and returns the result as a long long integer |
log(x) | Returns the natural logarithm of x |
log10(x) | Returns the base 10 logarithm of x |
log1p(x) | Returns the natural logarithm of x+1 |
log2(x) | Returns the base 2 logarithm of the absolute value of x |
logb(x) | Returns the floating-point base logarithm of the absolute value of x |
lrint(x) | Rounds x to a nearby integer and returns the result as a long integer |
lround(x) | Rounds x to the nearest integer and returns the result as a long integer |
modf(x, y) | Returns the decimal part of x and writes the integer part to the memory at the pointer y |
nan(s) | Returns a NaN (Not a Number) value |
nearbyint(x) | Returns x rounded to a nearby integer |
nextafter(x, y) | Returns the closest floating point number to x in the direction of y |
nexttoward(x, y) | Returns the closest floating point number to x in the direction of y |
pow(x, y) | Returns the value of x to the power of y |
remainder(x, y) | Return the remainder of x/y rounded to the nearest integer |
remquo(x, y, z) | Calculates x/y rounded to the nearest integer, writes the result to the memory at the pointer z and returns the remainder. |
rint(x) | Returns x rounded to a nearby integer |
round(x) | Returns x rounded to the nearest integer |
scalbln(x, y) | Returns x*Ry (R is usually 2) |
scalbn(x, y) | Returns x*Ry (R is usually 2) |
sin(x) | Returns the sine of x (x is in radians) |
sinh(x) | Returns the hyperbolic sine of x |
sqrt(x) | Returns the square root of x |
tan(x) | Returns the tangent of x (x is in radians) |
tanh(x) | Returns the hyperbolic tangent of x |
tgamma(x) | Returns the value of the gamma function at x |
trunc(x) | Returns the integer part of x |