102 lines
3.0 KiB
Markdown
102 lines
3.0 KiB
Markdown
# Math Library
|
|
|
|
Functions in the math library.
|
|
|
|
### @parent js/language
|
|
|
|
The math library includes math related functions that you can use with [Numbers](/microbit/reference/types/number).
|
|
|
|
* In the [TouchDevelop editor](/microbit/js/editor), click `math` to access the functions described below
|
|
* In the [Block editor](/microbit/blocks/editor), click **maths** on the left to see the available blocks
|
|
|
|
The functions available in Touch Develop are:
|
|
|
|
### abs
|
|
|
|
math `->` abs (x : [Number](/microbit/reference/types/number)) *returns* [Number](/microbit/reference/types/number)
|
|
|
|
returns the absolute value of input parameter `x`
|
|
|
|
```
|
|
basic.showNumber(math.abs(-7), 150)
|
|
```
|
|
|
|
### clamp
|
|
|
|
math `->` clamp (min : [Number](/microbit/reference/types/number), max : [Number](/microbit/reference/types/number), value : [Number](/microbit/reference/types/number)) *returns* [Number](/microbit/reference/types/number)
|
|
|
|
limits a number to a range (between a min and max number); returns `min` if `value` is < `min`; returns `max` if `value` is > `max`; otherwise, returns `value`.
|
|
|
|
```
|
|
basic.showNumber(td.clamp(5, 9, 12), 150)
|
|
```
|
|
|
|
### max
|
|
|
|
math `->` max (x : [Number](/microbit/reference/types/number), y : [Number](/microbit/reference/types/number)) *returns* [Number](/microbit/reference/types/number)
|
|
|
|
returns the larger of two input numbers (`x` and `y`)
|
|
|
|
```
|
|
basic.showNumber(Math.max(9, 7), 150)
|
|
```
|
|
|
|
### min
|
|
|
|
math `->` min (x : [Number](/microbit/reference/types/number), y : [Number](/microbit/reference/types/number)) *returns* [Number](/microbit/reference/types/number)
|
|
|
|
returns the smaller of two input numbers (`x` and `y`)
|
|
|
|
```
|
|
basic.showNumber(Math.min(9, 7), 150)
|
|
```
|
|
|
|
### mod
|
|
|
|
math `->` mod (x : [Number](/microbit/reference/types/number), y : [Number](/microbit/reference/types/number)) *returns* [Number](/microbit/reference/types/number)
|
|
|
|
returns the integer modulus/remainder resulting from the division of the number `x` by the number `y`
|
|
|
|
```
|
|
basic.showNumber(math.mod(9, 7), 150)
|
|
```
|
|
|
|
### pow
|
|
|
|
math `->` pow (base : [Number](/microbit/reference/types/number), exp : [Number](/microbit/reference/types/number)) *returns* [Number](/microbit/reference/types/number)
|
|
|
|
returns the value of the number `base` raised to the power `exp`
|
|
|
|
```
|
|
basic.showNumber(math.pow(3, 3), 150)
|
|
```
|
|
|
|
### random
|
|
|
|
math `->` random (limit : [Number](/microbit/reference/types/number)) *returns* [Number](/microbit/reference/types/number)
|
|
|
|
returns a random [Number](/microbit/reference/types/number) between 0 and the parameter *limit* - 1
|
|
|
|
```
|
|
basic.showNumber(Math.random(10), 150)
|
|
```
|
|
|
|
### sign
|
|
|
|
math `->` sign (x : [Number](/microbit/reference/types/number)) *returns* [Number](/microbit/reference/types/number)
|
|
|
|
returns the sign of input parameter `x`
|
|
|
|
```
|
|
basic.showNumber(math.sign(-7), 150)
|
|
```
|
|
|
|
### Lessons
|
|
|
|
[flipping bird](/microbit/lessons/flipping-bird), [catch the egg game](/microbit/lessons/catch-the-egg-game)
|
|
|
|
### See also
|
|
|
|
[Bits library](/microbit/js/bits), [TouchDevelop documentation](/microbit/js/contents), [Number](/microbit/reference/types/number)
|
|
|