# API for clojure.math - Clojurev1.12.0 (in development)

by Alex Miller

Full namespace name: clojure.math

## Overview

```Clojure wrapper functions for java.lang.Math static methods.

Function calls are inlined for performance, and type hinted for primitive
long or double parameters where appropriate. In general, Math methods are
optimized for performance and have bounds for error tolerance. If
greater precision is needed, use java.lang.StrictMath directly instead.

For more complete information, see:
https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html```

## E

var

```Constant for e, the base for natural logarithms.
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#E```

Source

## IEEE-remainder

function
```Usage: (IEEE-remainder dividend divisor)
```
```Returns the remainder per IEEE 754 such that
remainder = dividend - divisor * n
where n is the integer closest to the exact value of dividend / divisor.
If two integers are equally close, then n is the even one.
If the remainder is zero, sign will match dividend.
If dividend or divisor is ##NaN, or dividend is ##Inf or ##-Inf, or divisor is zero => ##NaN
If dividend is finite and divisor is infinite => dividend
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#IEEEremainder-double-double-```

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## PI

var

```Constant for pi, the ratio of the circumference of a circle to its diameter.
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#PI```

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## acos

function
```Usage: (acos a)
```
```Returns the arc cosine of a, in the range 0.0 to pi.
If a is ##NaN or |a|>1 => ##NaN
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#acos-double-```

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function
```Usage: (add-exact x y)
```
```Returns the sum of x and y, throws ArithmeticException on overflow.

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## asin

function
```Usage: (asin a)
```
```Returns the arc sine of an angle, in the range -pi/2 to pi/2.
If a is ##NaN or |a|>1 => ##NaN
If a is zero => zero with the same sign as a
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#asin-double-```

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## atan

function
```Usage: (atan a)
```
```Returns the arc tangent of a, in the range of -pi/2 to pi/2.
If a is ##NaN => ##NaN
If a is zero => zero with the same sign as a
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#atan-double-```

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## atan2

function
```Usage: (atan2 y x)
```
```Returns the angle theta from the conversion of rectangular coordinates (x, y) to polar coordinates (r, theta).
Computes the phase theta by computing an arc tangent of y/x in the range of -pi to pi.
For more details on special cases, see:
https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#atan2-double-double-```

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## cbrt

function
```Usage: (cbrt a)
```
```Returns the cube root of a.
If a is ##NaN => ##NaN
If a is ##Inf or ##-Inf => a
If a is zero => zero with sign matching a
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#cbrt-double-```

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## ceil

function
```Usage: (ceil a)
```
```Returns the smallest double greater than or equal to a, and equal to a
mathematical integer.
If a is ##NaN or ##Inf or ##-Inf or already equal to an integer => a
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#ceil-double-```

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## copy-sign

function
```Usage: (copy-sign magnitude sign)
```
```Returns a double with the magnitude of the first argument and the sign of
the second.
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#copySign-double-double-```

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## cos

function
```Usage: (cos a)
```
```Returns the cosine of an angle.
If a is ##NaN, ##-Inf, ##Inf => ##NaN
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#cos-double-```

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## cosh

function
```Usage: (cosh x)
```
```Returns the hyperbolic cosine of x, (e^x + e^-x)/2.
If x is ##NaN => ##NaN
If x is ##Inf or ##-Inf => ##Inf
If x is zero => 1.0
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#cosh-double-```

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## decrement-exact

function
```Usage: (decrement-exact a)
```
```Returns a decremented by 1, throws ArithmeticException on overflow.
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#decrementExact-long-```

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## exp

function
```Usage: (exp a)
```
```Returns Euler's number e raised to the power of a.
If a is ##NaN => ##NaN
If a is ##Inf => ##Inf
If a is ##-Inf => +0.0
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#exp-double-```

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## expm1

function
```Usage: (expm1 x)
```
```Returns e^x - 1. Near 0, expm1(x)+1 is more accurate to e^x than exp(x).
If x is ##NaN => ##NaN
If x is ##Inf => #Inf
If x is ##-Inf => -1.0
If x is zero => x
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#expm1-double-```

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## floor

function
```Usage: (floor a)
```
```Returns the largest double less than or equal to a, and equal to a
mathematical integer.
If a is ##NaN or ##Inf or ##-Inf or already equal to an integer => a
If a is less than zero but greater than -1.0 => -0.0
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#floor-double-```

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## floor-div

function
```Usage: (floor-div x y)
```
```Integer division that rounds to negative infinity (as opposed to zero).
The special case (floorDiv Long/MIN_VALUE -1) overflows and returns Long/MIN_VALUE.
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#floorDiv-long-long-```

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## floor-mod

function
```Usage: (floor-mod x y)
```
```Integer modulus x - (floorDiv(x, y) * y). Sign matches y and is in the
range -|y| < r < |y|.
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#floorMod-long-long-```

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## get-exponent

function
```Usage: (get-exponent d)
```
```Returns the exponent of d.
If d is ##NaN, ##Inf, ##-Inf => Double/MAX_EXPONENT + 1
If d is zero or subnormal => Double/MIN_EXPONENT - 1
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#getExponent-double-```

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## hypot

function
```Usage: (hypot x y)
```
```Returns sqrt(x^2 + y^2) without intermediate underflow or overflow.
If x or y is ##Inf or ##-Inf => ##Inf
If x or y is ##NaN and neither is ##Inf or ##-Inf => ##NaN
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#hypot-double-double-```

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## increment-exact

function
```Usage: (increment-exact a)
```
```Returns a incremented by 1, throws ArithmeticException on overflow.
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#incrementExact-long-```

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## log

function
```Usage: (log a)
```
```Returns the natural logarithm (base e) of a.
If a is ##NaN or negative => ##NaN
If a is ##Inf => ##Inf
If a is zero => ##-Inf
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#log-double-```

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## log10

function
```Usage: (log10 a)
```
```Returns the logarithm (base 10) of a.
If a is ##NaN or negative => ##NaN
If a is ##Inf => ##Inf
If a is zero => ##-Inf
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#log10-double-```

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## log1p

function
```Usage: (log1p x)
```
```Returns ln(1+x). For small values of x, log1p(x) is more accurate than
log(1.0+x).
If x is ##NaN or < -1 => ##NaN
If x is ##Inf => ##Inf
If x is -1 => ##-Inf
If x is 0 => 0 with sign matching x
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#log1p-double-```

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## multiply-exact

function
```Usage: (multiply-exact x y)
```
```Returns the product of x and y, throws ArithmeticException on overflow.
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#multiplyExact-long-long-```

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## negate-exact

function
```Usage: (negate-exact a)
```
```Returns the negation of a, throws ArithmeticException on overflow.
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#negateExact-long-```

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## next-after

function
```Usage: (next-after start direction)
```
```Returns the adjacent floating point number to start in the direction of
the second argument. If the arguments are equal, the second is returned.
If either arg is #NaN => #NaN
If both arguments are signed zeros => direction
If start is +-Double/MIN_VALUE and direction would cause a smaller magnitude
=> zero with sign matching start
If start is ##Inf or ##-Inf and direction would cause a smaller magnitude
=> Double/MAX_VALUE with same sign as start
If start is equal to +=Double/MAX_VALUE and direction would cause a larger magnitude
=> ##Inf or ##-Inf with sign matching start
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#nextAfter-double-double-```

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## next-down

function
```Usage: (next-down d)
```
```Returns the adjacent double of d in the direction of ##-Inf.
If d is ##NaN => ##NaN
If d is ##-Inf => ##-Inf
If d is zero => -Double/MIN_VALUE
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#nextDown-double-```

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## next-up

function
```Usage: (next-up d)
```
```Returns the adjacent double of d in the direction of ##Inf.
If d is ##NaN => ##NaN
If d is ##Inf => ##Inf
If d is zero => Double/MIN_VALUE
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#nextUp-double-```

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## pow

function
```Usage: (pow a b)
```
```Returns the value of a raised to the power of b.
For more details on special cases, see:
https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#pow-double-double-```

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## random

function
```Usage: (random)
```
```Returns a positive double between 0.0 and 1.0, chosen pseudorandomly with
approximately random distribution.
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#random--```

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## rint

function
```Usage: (rint a)
```
```Returns the double closest to a and equal to a mathematical integer.
If two values are equally close, return the even one.
If a is ##NaN or ##Inf or ##-Inf or zero => a
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#rint-double-```

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## round

function
```Usage: (round a)
```
```Returns the closest long to a. If equally close to two values, return the one
closer to ##Inf.
If a is ##NaN => 0
If a is ##-Inf or < Long/MIN_VALUE => Long/MIN_VALUE
If a is ##Inf or > Long/MAX_VALUE => Long/MAX_VALUE
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#round-double-```

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## scalb

function
```Usage: (scalb d scaleFactor)
```
```Returns d * 2^scaleFactor, scaling by a factor of 2. If the exponent
is between Double/MIN_EXPONENT and Double/MAX_EXPONENT, the answer is exact.
If d is ##NaN => ##NaN
If d is ##Inf or ##-Inf => ##Inf or ##-Inf respectively
If d is zero => zero of same sign as d
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#nextDown-double-```

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## signum

function
```Usage: (signum d)
```
```Returns the signum function of d - zero for zero, 1.0 if >0, -1.0 if <0.
If d is ##NaN => ##NaN
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#signum-double-```

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## sin

function
```Usage: (sin a)
```
```Returns the sine of an angle.
If a is ##NaN, ##-Inf, ##Inf => ##NaN
If a is zero => zero with the same sign as a
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#sin-double-```

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## sinh

function
```Usage: (sinh x)
```
```Returns the hyperbolic sine of x, (e^x - e^-x)/2.
If x is ##NaN => ##NaN
If x is ##Inf or ##-Inf or zero => x
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#sinh-double-```

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## sqrt

function
```Usage: (sqrt a)
```
```Returns the positive square root of a.
If a is ##NaN or negative => ##NaN
If a is ##Inf => ##Inf
If a is zero => a
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#sqrt-double-```

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## subtract-exact

function
```Usage: (subtract-exact x y)
```
```Returns the difference of x and y, throws ArithmeticException on overflow.
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#subtractExact-long-long-```

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## tan

function
```Usage: (tan a)
```
```Returns the tangent of an angle.
If a is ##NaN, ##-Inf, ##Inf => ##NaN
If a is zero => zero with the same sign as a
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#tan-double-```

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## tanh

function
```Usage: (tanh x)
```
```Returns the hyperbolic tangent of x, sinh(x)/cosh(x).
If x is ##NaN => ##NaN
If x is zero => zero, with same sign
If x is ##Inf => +1.0
If x is ##-Inf => -1.0
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#tanh-double-```

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## to-degrees

function
```Usage: (to-degrees r)
```
```Converts an angle in radians to an approximate equivalent angle in degrees.
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#toDegrees-double-```

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function
```Usage: (to-radians deg)
```
```Converts an angle in degrees to an approximate equivalent angle in radians.

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## ulp

function
```Usage: (ulp d)
```
```Returns the size of an ulp (unit in last place) for d.
If d is ##NaN => ##NaN
If d is ##Inf or ##-Inf => ##Inf
If d is zero => Double/MIN_VALUE
If d is +/- Double/MAX_VALUE => 2^971
See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#ulp-double-```