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#include <math.h>
| Description | |
| cbrt | cube root |
| fma | fused multiply-add |
| hypot | Euclidean distance |
| sqrt | square root |
| Description | |
| fpclassify | classify a floating-point value |
| isfinite | determine whether a value is finite |
| isinf | determine whether a value is infinite |
| isnan | determine whether a value is NaN |
| isnormal | determine whether a value is normalized |
| Description | |
| frexp | extract exponent and mantissa |
| ilogb | extract exponent |
| ldexp | multiply by power of 2 |
| logb | extract exponent |
| scalbln | adjust exponent |
| scalbn | adjust exponent |
| Description | |
| copysign | copy sign bit |
| fabs | absolute value |
| fdim | positive difference |
| fmax | maximum function |
| fmin | minimum function |
| signbit | extract sign bit |
| Description | |
| nan | generate a quiet NaN |
| Description | |
| ceil | integer no less than |
| floor | integer no greater than |
| fmod | positive remainder |
| llrint | round to integer in fixed-point format |
| llround | round to nearest integer in fixed-point format |
| lrint | round to integer in fixed-point format |
| lround | round to nearest integer in fixed-point format |
| modf | extract integer and fractional parts |
| nearbyint | round to integer (silent) |
| nextafter | next representable value |
| nexttoward | next representable value |
| remainder | remainder |
| remquo | remainder with partial quotient |
| rint | round to integer |
| round | round to nearest integer |
| trunc | integer no greater in magnitude than |
The ceil(), floor(), llround(), lround(), round(), and trunc() functions round in predetermined directions, whereas llrint(), lrint(), and rint() round according to the current (dynamic) rounding mode. For more information on controlling the dynamic rounding mode, see fenv(3) and fesetround(3).
| Description | |
| isgreater | greater than relation |
| isgreaterequal | greater than or equal to relation |
| isless | less than relation |
| islessequal | less than or equal to relation |
| islessgreater | less than or greater than relation |
| isunordered | unordered relation |
| Description | |
| acos | inverse cosine |
| acosh | inverse hyperbolic cosine |
| asin | inverse sine |
| asinh | inverse hyperbolic sine |
| atan | inverse tangent |
| atanh | inverse hyperbolic tangent |
| atan2 | atan(y/x); complex argument |
| cos | cosine |
| cosh | hyperbolic cosine |
| erf | error function |
| erfc | complementary error function |
| exp | exponential base e |
| exp2 | exponential base 2 |
| expm1 | exp(x)-1 |
| j0 | Bessel function of the first kind of the order 0 |
| j1 | Bessel function of the first kind of the order 1 |
| jn | Bessel function of the first kind of the order n |
| lgamma | log gamma function |
| log | natural logarithm |
| log10 | logarithm to base 10 |
| log1p | log(1+x) |
| log2 | base 2 logarithm |
| pow | exponential x**y |
| sin | trigonometric function |
| sinh | hyperbolic function |
| tan | trigonometric function |
| tanh | hyperbolic function |
| tgamma | gamma function |
| y0 | Bessel function of the second kind of the order 0 |
| y1 | Bessel function of the second kind of the order 1 |
| yn | Bessel function of the second kind of the order n |
The routines in this section might not produce a result that is correctly rounded, so reproducible results cannot be guaranteed across platforms. For most of these functions, however, incorrect rounding occurs rarely, and then only in very-close-to-halfway cases.
On the i386 platform, trigonometric argument reduction is not performed accurately for huge arguments, resulting in large errors for such arguments to cos(), sin(), and tan().
| MATH (3) | December 7, 2017 |
| Main index | Section 3 | 日本語 | Options |
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