# math

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Module

math

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Module Summary

Mathematical functions.

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Description

This module provides an interface to a number of mathematical functions.

Note

Not all functions are provided on all platforms. In particular, the erf/1 and erfc/1 functions are not provided on Windows.

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Exports

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acos(X) -> float()

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acosh(X) -> float()

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asin(X) -> float()

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asinh(X) -> float()

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atan(X) -> float()

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atan2(Y, X) -> float()

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atanh(X) -> float()

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ceil(X) -> float()
OTP 20.0

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cos(X) -> float()

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cosh(X) -> float()

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exp(X) -> float()

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floor(X) -> float()
OTP 20.0

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fmod(X, Y) -> float()
OTP 20.0

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log(X) -> float()

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log10(X) -> float()

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log2(X) -> float()
OTP 18.0

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pow(X, Y) -> float()

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sin(X) -> float()

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sinh(X) -> float()

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sqrt(X) -> float()

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tan(X) -> float()

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tanh(X) -> float()

### Types

Y = X = number()

A collection of mathematical functions that return floats. Arguments are numbers.

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erf(X) -> float()

### Types

X = number()

Returns the error function of X, where:

    erf(X) = 2/sqrt(pi)*integral from 0 to X of exp(-t*t) dt.

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erfc(X) -> float()

### Types

X = number()

erfc(X) returns 1.0 - erf(X), computed by methods that avoid cancellation for large X.

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pi() -> float()

Ratio of the circumference of a circle to its diameter.

Floating point approximation of mathematical constant pi.

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tau() -> float()
OTP 26.0

Ratio of the circumference of a circle to its radius.

This constant is equivalent to a full turn when described in radians.

The same as 2 * pi().

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Limitations

As these are the C library, the same limitations apply.