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33 lines
1.0 KiB
Plaintext
33 lines
1.0 KiB
Plaintext
\section random random - generate random number
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\subsection random-synopsis Synopsis
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\fish{synopsis}
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random [SEED]
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\endfish
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\subsection random-description Description
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`random` outputs a psuedo-random number from 0 to 32767, inclusive.
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Even ignoring the very narrow range of values you should not assume
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this produces truly random values within that range. Do not use the
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value for any cryptographic purposes, and take care to handle collisions:
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the same random number appearing more than once in a given fish instance.
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If a `SEED` value is provided, it is used to seed the random number
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generator, and no output will be produced. This can be useful for debugging
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purposes, where it can be desirable to get the same random number sequence
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multiple times. If the random number generator is called without first
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seeding it, the current time will be used as the seed.
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\subsection random-example Example
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The following code will count down from a random number to 1:
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\fish
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for i in (seq (random) -1 1)
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echo $i
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sleep
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end
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\endfish
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