prng.rand â float
prng.rand(max) â number
prng.rand(max) â number
Instance Public methods
When max is an Integer,
rand returns a random integer greater than or equal to zero
and less than max. Unlike Kernel#rand, when max is
a negative integer or zero, rand raises an ArgumentError.
1 2 | prng = Random.newprng.rand(100) # => 42 |
When max is a Float,
rand returns a random floating point number between 0.0 and
max, including 0.0 and excluding max.
1 | prng.rand(1.5) # => 1.4600282860034115 |
When max is a Range,
rand returns a random number where range.member?(number) ==
true.
1 2 3 4 | prng.rand(5..9) # => one of [5, 6, 7, 8, 9]prng.rand(5...9) # => one of [5, 6, 7, 8]prng.rand(5.0..9.0) # => between 5.0 and 9.0, including 9.0prng.rand(5.0...9.0) # => between 5.0 and 9.0, excluding 9.0 |
Both the beginning and ending values of the range must respond to subtract
(-) and add (+)methods, or rand will raise an ArgumentError.
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