This header was originally in the C standard library as <math.h>.
This header is part of the numeric library.
Macro constants
| (C++11)(C++11) | indicates the overflow value for float, double and long double respectively (macro constant) |
| (C++11) | evaluates to positive infinity or the value guaranteed to overflow a float (macro constant) |
| (C++11) | evaluates to a quiet NaN of type float (macro constant) |
| (C++11)(C++11)(C++11) | defines the error handling mechanism used by the common mathematical functions (macro constant) |
Classification | |
| (C++11)(C++11)(C++11)(C++11)(C++11) | indicates a floating-point category (macro constant) |
Types
| float_t (C++11) | most efficient floating-point type at least as wide as float (typedef) |
| double_t (C++11) | most efficient floating-point type at least as wide as double (typedef) |
Functions
Basic operations | |
| absolute value of a floating point value (|x|) (function) | |
| remainder of the floating point division operation (function) | |
| (C++11) | signed remainder of the division operation (function) |
| (C++11) | signed remainder as well as the three last bits of the division operation (function) |
| (C++11) | fused multiply-add operation (function) |
| (C++11) | larger of two floating point values (function) |
| (C++11) | smaller of two floating point values (function) |
| (C++11) | positive difference of two floating point values (max(0, x-y)) (function) |
| (C++11)(C++11)(C++11) | not-a-number (NaN) (function) |
Exponential functions | |
| returns e raised to the given power (ex) (function) | |
| (C++11) | returns 2 raised to the given power (2x) (function) |
| (C++11) | returns e raised to the given power, minus one (ex-1) (function) |
| computes natural (base e) logarithm (to base e) (ln(x)) (function) | |
| computes common (base 10) logarithm (log10(x)) (function) | |
| (C++11) | base 2 logarithm of the given number (log2(x)) (function) |
| (C++11) | natural logarithm (to base e) of 1 plus the given number (ln(1+x)) (function) |
Power functions | |
| raises a number to the given power (xy) (function) | |
| computes square root (√x) (function) | |
| (C++11) | computes cubic root (3√x) (function) |
| (C++11) | computes square root of the sum of the squares of two given numbers (√x2 +y2 ) (function) |
Trigonometric functions | |
| computes sine (sin(x)) (function) | |
| computes cosine (cos(x)) (function) | |
| computes tangent (tan(x)) (function) | |
| computes arc sine (arcsin(x)) (function) | |
| computes arc cosine (arccos(x)) (function) | |
| computes arc tangent (arctan(x)) (function) | |
| arc tangent, using signs to determine quadrants (function) | |
Hyperbolic functions | |
| computes hyperbolic sine (sh(x)) (function) | |
| computes hyperbolic cosine (ch(x)) (function) | |
| hyperbolic tangent (function) | |
| (C++11) | computes the inverse hyperbolic sine (arsinh(x)) (function) |
| (C++11) | computes the inverse hyperbolic cosine (arcosh(x)) (function) |
| (C++11) | computes the inverse hyperbolic tangent (artanh(x)) (function) |
Error and gamma functions | |
| (C++11) | error function (function) |
| (C++11) | complementary error function (function) |
| (C++11) | gamma function (function) |
| (C++11) | natural logarithm of the gamma function (function) |
Nearest integer floating point operations | |
| nearest integer not less than the given value (function) | |
| nearest integer not greater than the given value (function) | |
| (C++11) | nearest integer not greater in magnitude than the given value (function) |
| (C++11)(C++11)(C++11) | nearest integer, rounding away from zero in halfway cases (function) |
| (C++11) | nearest integer using current rounding mode (function) |
| (C++11)(C++11)(C++11) | nearest integer using current rounding mode with exception if the result differs (function) |
Floating point manipulation functions | |
decomposes a number into significand and a power of 2 (function) | |
multiplies a number by 2 raised to a power (function) | |
| decomposes a number into integer and fractional parts (function) | |
| (C++11)(C++11) | multiplies a number by FLT_RADIX raised to a power (function) |
| (C++11) | extracts exponent of the number (function) |
| (C++11) | extracts exponent of the number (function) |
| (C++11)(C++11) | next representable floating point value towards the given value (function) |
| (C++11) | copies the sign of a floating point value (function) |
Classification and comparison | |
| (C++11) | categorizes the given floating point value (function) |
| (C++11) | checks if the given number has finite value (function) |
| (C++11) | checks if the given number is infinite (function) |
| (C++11) | checks if the given number is NaN (function) |
| (C++11) | checks if the given number is normal (function) |
| (C++11) | checks if the given number is negative (function) |
| (C++11) | checks if the first floating-point argument is greater than the second (function) |
| (C++11) | checks if the first floating-point argument is greater or equal than the second (function) |
| (C++11) | checks if the first floating-point argument is less than the second (function) |
| (C++11) | checks if the first floating-point argument is less or equal than the second (function) |
| (C++11) | checks if the first floating-point argument is less or greater than the second (function) |
| (C++11) | checks if two floating-point values are unordered (function) |
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