**How to use**

`+`

Addition

`-`

Subtraction

`*`

Multiplication

Use the Math method when using special numbers or expressions.

Example: `Math.PI`

or `Math.sin(integer)`

.

**Keyboard**

`Arrow key up`

- *copy last expression to input*

`Esc`

- *instructions*

**Special numbers**

`E`

- *Euler's number (2.718)*

`LN2`

- *Natural logarithm of 2 (0.693)*

`LN10`

- *Natural logarithm of 10 (2.302)*

`LOG2E`

- *Base-2 logarithm of E (1.442)*

`LOG10E`

- *Base-10 logarithm of E (0.434)*

`PI`

- *Value of PI (3.14)*

`SQRT1_2`

- *Square root of 1/2 (0.707)*

`SQRT2`

- *Square root of 2 (1.414)*

**Math expressions**

`abs(x)`

- *Absolute value of x*

`acos(x)`

- *Arccosine of x, in radians*

`asin(x)`

- *Arcsine of x, in radians*

`atan(x)`

- *Arctangent of x as a numeric value between -PI/2 and PI/2 radians*

`atan2(y,x)`

- *Arctangent of the quotient of its arguments*

`ceil(x)`

- *Value of x rounded upwards to the nearest integer*

`cos(x)`

- *Cosine of x (x is in radians)*

`exp(x)`

- *Value of Ex*

`floor(x)`

- *Value of x, rounded downwards to the nearest integer*

`log(x)`

- *Natural logarithm (base E) of x*

`max(x,y,z,...,n)`

- *Number with the highest value*

`min(x,y,z,...,n)`

- *Number with the lowest value*

`pow(x,y)`

- *Value of x to the power of y*

`random()`

- *Random number between 0 and 1. Example: Math.floor((*`Math.random()*10)+1)`

`round(x)`

- *Rounds x to the nearest integer*

`sin(x)`

- *Sine of x (x is in radians)*

`sqrt(x)`

- *Square root of x*

`tan(x)`

- *Tangent of an angle*

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