On Jun 9, 9:35 ¨Âí¬ ÔéÈõîôåò ¼ÔéíÈõî®®®Àîã®òò®ãïí÷òïôåº
> David Stanislaus wrote:
> > How would you create a random number generator thats limited to a
> > specific rang? say
>
> > 1930 - 1950
>
> > Thanks
>
> Observe that Kernel#rand accepts an argument. If present and not 0, then
> rand returns numbers >= 0.0 and < the argument. So
>
> x = rand(20)
>
> will always return a number n such that 0.0 <= n < 20. All you have to
> do is add 1930 to it:
>
> x = 1930 + rand(20)

Well if the desired range is 1930-1950 *inclusive*, then it should be:

    x = 1930 + rand(21)

since there are 21 distinct values in the inclusive range.

Or, more generally for inclusive boundaries:

    x = low + rand(high - low + 1)

Eric

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