##
数学

#### Where Is Maths Used ?

- When you do
`Variable Set`

and click the *Do Maths* checkbox
- With the
`If`

action, if you select a mathematical comparison like **<** or **=**
- With individual action conditions when a mathematical comparison is selected

#### What's Available

#### Operators

**+ - * /** - the basic operators
**%** - modulus
**^** - power

##### Constants

**E** - the base of the natural logarithms
**EUL** - Euler's Constant
**LN2** - log of 2 base e
**LN10** - log of 10 base e
**LOG2E** - log of e base 2
**LOG10E** - log of e base 10
**PHI** - the golden ratio
**PI** - the ratio of the circumference of a circle to its diameter

##### Functions

Functions take their argument in parenthesis e.g. sin(90)
**abs** - absolute value
**acos** - arc cosine; the returned angle is in the range 0.0 through pi
**asin** - arc sine; the returned angle is in the range -pi/2 through pi/2
**atan** - arc tangent; the returned angle is in the range -pi/2 through pi/2
**cbrt** - cube root
**ceil** - smallest value that is greater than or equal to the argument and is an integer
**cos** - trigonometric cosine
**cosh** - hyperbolic cosine
**exp** - Euler's number e raised to the power of the value
**expm1** - *e*x-1
**floor** - largest value that is less than or equal to the argument and is an integer
**getExp** - unbiased exponent used in the representation of val
**log** - natural logarithm (base e)
**log10** - base 10 logarithm
**log1p** - natural logarithm of (val+1)
**nextup** - floating-point value adjacent to val in the direction of positive infinity
**round** - closest 64 bit integer to the argument
**roundhe** - double value that is closest in value to the argument and is equal to a mathematical integer, using the half-even rounding method.
**signum** - signum function of the argument; zero if the argument is zero, 1.0 if the argument is greater than zero, -1.0 if the argument is less than zero
**sin** - trigonometric sine
**sinh** - hyperbolic sine
**sqrt** - correctly rounded positive square root
**tan** - trigonometric tangent
**tanh** - hyperbolic tangent
**todeg** - converts an angle measured in radians to an approximately equivalent angle measured in degrees
**torad** - converts an angle measured in degrees to an approximately equivalent angle measured in radians
**ulp** - size of an ulp of the argument