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