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Standard library header <cmath>

From cppreference.com
< cpp‎ | header

This header was originally in the C standard library as <math.h>.

This header is part of the numeric library.

Contents

[edit] Types

float_t most efficient floating-point type at least as wide as float
double_t most efficient floating-point type at least as wide as double
Defined in header <cstdlib>
div_t structure type, return of the std::div function
ldiv_t structure type, return of the std::ldiv function
lldiv_t structure type, return of the std::lldiv function

[edit] Macro constants

indicates the overflow value for float, double and long double respectively
(macro constant) [edit]
(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)
defines the error handling mechanism used by the common mathematical functions
(macro constant) [edit]

[edit] Functions

Basic operations
computes absolute value of an integral value (|x|)
(function) [edit]
absolute value of a floating point value (|x|)
(function) [edit]
the quotient and remainder of integer division
(function) [edit]
remainder of the floating point division operation
(function) [edit]
(C++11)
signed remainder of the division operation
(function) [edit]
(C++11)
signed remainder as well as the three last bits of the division operation
(function) [edit]
(C++11)
fused multiply-add operation
(function) [edit]
(C++11)
larger of two floating point values
(function) [edit]
(C++11)
smaller of two floating point values
(function) [edit]
(C++11)
positive difference of two floating point values (max(0, x-y))
(function) [edit]
(C++11)(C++11)(C++11)
not-a-number (NaN)
(function) [edit]
Exponential functions
returns e raised to the given power (ex)
(function) [edit]
(C++11)
returns 2 raised to the given power (2x)
(function) [edit]
(C++11)
returns e raised to the given power, minus one (ex-1)
(function) [edit]
computes natural (base e) logarithm (to base e) (ln(x))
(function) [edit]
computes common (base 10) logarithm (log10(x))
(function) [edit]
(C++11)
natural logarithm (to base e) of 1 plus the given number
(function) [edit]
(C++11)
base 2 logarithm of the given number
(function) [edit]
Power functions
computes square root (x)
(function) [edit]
(C++11)
computes cubic root (3x)
(function) [edit]
(C++11)
computes square root of the sum of the squares of two given numbers (x2
+y2
)
(function) [edit]
raises a number to the given power (xy)
(function) [edit]
Trigonometric functions
computes sine (sin(x))
(function) [edit]
computes cosine (cos(x))
(function) [edit]
computes tangent (tan(x))
(function) [edit]
computes arc sine (arcsin(x))
(function) [edit]
computes arc cosine (arccos(x))
(function) [edit]
computes arc tangent (arctan(x))
(function) [edit]
arc tangent, using signs to determine quadrants
(function) [edit]
Hyperbolic functions
computes hyperbolic sine (sh(x))
(function) [edit]
computes hyperbolic cosine (ch(x))
(function) [edit]
hyperbolic tangent
(function) [edit]
(C++11)
area hyperbolic sine
(function) [edit]
(C++11)
area hyperbolic cosine
(function) [edit]
(C++11)
area hyperbolic tangent
(function) [edit]
Error and gamma functions
(C++11)
error function
(function) [edit]
(C++11)
complementary error function
(function) [edit]
(C++11)
natural logarithm of the gamma function
(function) [edit]
(C++11)
gamma function
(function) [edit]
Nearest integer floating point operations
nearest integer not less than the given value
(function) [edit]
nearest integer not greater than the given value
(function) [edit]
(C++11)
nearest integer not greater in magnitude than the given value
(function) [edit]
(C++11)(C++11)(C++11)
nearest integer, rounding away from zero in halfway cases
(function) [edit]
(C++11)
nearest integer using current rounding mode
(function) [edit]
(C++11)(C++11)(C++11)
nearest integer using current rounding mode with
exception if the result differs
(function) [edit]
Floating point manipulation functions
decomposes a number into significand and a power of 2
(function) [edit]
multiplies a number by 2 raised to a power
(function) [edit]
decomposes a number into integer and fractional parts
(function) [edit]
(C++11)(C++11)
multiplies a number by FLT_RADIX raised to a power
(function) [edit]
(C++11)
extracts exponent of the number
(function) [edit]
(C++11)
extracts exponent of the number
(function) [edit]
(C++11)(C++11)
next representable floating point value towards the given value
(function) [edit]
(C++11)
copies the sign of a floating point value
(function) [edit]
Classification and comparison
categorizes the given floating point value
(function) [edit]
(C++11)
checks if the given number has finite value
(function) [edit]
(C++11)
checks if the given number is infinite
(function) [edit]
(C++11)
checks if the given number is NaN
(function) [edit]
(C++11)
checks if the given number is normal
(function) [edit]
(C++11)
checks if the given number is negative
(function) [edit]
(C++11)
checks if the first floating-point argument is greater than the second
(function) [edit]
checks if the first floating-point argument is greater or equal than the second
(function) [edit]
(C++11)
checks if the first floating-point argument is less than the second
(function) [edit]
checks if the first floating-point argument is less or equal than the second
(function) [edit]
checks if the first floating-point argument is less or greater than the second
(function) [edit]
checks if two floating-point values are unordered
(function) [edit]