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class method

Random.rand

(?0) -> ::Float

(::Integer | ::Range[::Integer] max) -> ::Integer

(::Float | ::Range[::Float] max) -> ::Float

[T < ::Numeric] (::Range[T]) -> T

Random.rand → float

Random.rand(max) → number

Random.rand(range) → number

random.c View on GitHub ↗

static VALUE
random_s_rand(int argc, VALUE *argv, VALUE obj)
{
    VALUE v = rand_random(argc, argv, Qnil, &random_mt_if, default_rand_start());
    check_random_number(v, argv);
    return v;
}

Returns a random number using the Ruby system PRNG.

Ruby version changes

3.0
- Random::DEFAULT is deprecated since its value is now confusing and it is no longer global, use Kernel.rand/Random.rand directly, or create a Random instance with Random.new instead. [Feature #17351]

See also #rand .new_seed .seed .new also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

‹ prev.new_seed next ›.seed