# OpenEuphoria Manual

## Euphoria v4.1

routine or constant name search

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## 8.26 Math Constants

### 8.26.1 Constants

#### 8.26.1.1 PI

    include std/mathcons.e
    namespace mathcons
    public constant PI

PI is the ratio of a circle's circumference to it's diameter.

PI = C / D :: C = PI * D :: C = PI * 2 * R(radius)

#### 8.26.1.2 QUARTPI

    include std/mathcons.e
    namespace mathcons
    public constant QUARTPI

Quarter of PI

#### 8.26.1.3 HALFPI

    include std/mathcons.e
    namespace mathcons
    public constant HALFPI

Half of PI

#### 8.26.1.4 TWOPI

    include std/mathcons.e
    namespace mathcons
    public constant TWOPI

Two times PI

#### 8.26.1.5 PISQR

    include std/mathcons.e
    namespace mathcons
    public constant PISQR

PI ^ 2

#### 8.26.1.6 INVSQ2PI

    include std/mathcons.e
    namespace mathcons
    public constant INVSQ2PI

1 / (sqrt(2PI))

#### 8.26.1.7 PHI

    include std/mathcons.e
    namespace mathcons
    public constant PHI

phi => Golden Ratio = (1 + sqrt(5)) / 2

#### 8.26.1.8 E

    include std/mathcons.e
    namespace mathcons
    public constant E

Euler (e)The base of the natural logarithm.

#### 8.26.1.9 LN2

    include std/mathcons.e
    namespace mathcons
    public constant LN2

ln(2) :: 2 = power(E, LN2)

#### 8.26.1.10 INVLN2

    include std/mathcons.e
    namespace mathcons
    public constant INVLN2

1 / (ln(2))

#### 8.26.1.11 LN10

    include std/mathcons.e
    namespace mathcons
    public constant LN10

ln(10) :: 10 = power(E, LN10)

#### 8.26.1.12 INVLN10

    include std/mathcons.e
    namespace mathcons
    public constant INVLN10

1 / ln(10)

#### 8.26.1.13 SQRT2

    include std/mathcons.e
    namespace mathcons
    public constant SQRT2

sqrt(2)

#### 8.26.1.14 HALFSQRT2

    include std/mathcons.e
    namespace mathcons
    public constant HALFSQRT2

sqrt(2)/ 2

#### 8.26.1.15 SQRT3

    include std/mathcons.e
    namespace mathcons
    public constant SQRT3

Square root of 3

#### 8.26.1.16 DEGREES_TO_RADIANS

    include std/mathcons.e
    namespace mathcons
    public constant DEGREES_TO_RADIANS

Conversion factor: Degrees to Radians = PI / 180

#### 8.26.1.17 RADIANS_TO_DEGREES

    include std/mathcons.e
    namespace mathcons
    public constant RADIANS_TO_DEGREES

Conversion factor: Radians to Degrees = 180 / PI

#### 8.26.1.18 EULER_GAMMA

    include std/mathcons.e
    namespace mathcons
    public constant EULER_GAMMA

Gamma (Euler Gamma)

#### 8.26.1.19 SQRTE

    include std/mathcons.e
    namespace mathcons
    public constant SQRTE

sqrt(e)

#### 8.26.1.20 PINF

    include std/mathcons.e
    namespace mathcons
    public constant PINF

Positive Infinity

#### 8.26.1.21 MINF

    include std/mathcons.e
    namespace mathcons
    public constant MINF

Negative Infinity

#### 8.26.1.22 SQRT5

    include std/mathcons.e
    namespace mathcons
    public constant SQRT5

sqrt(5)

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<< 7 Included Tools | < 8.25 Math | Up: 8 API Reference | 8.27 Random Numbers > | 9 Release Notes >>