Function: random_real

DOC_MSE_VERSION: since 0.3.7

--Usage--
> random_real(begin: lower bound, end: upper bound)

Returns a random [[type:double]] between @begin@ and @end@.
By default the range @0.0@ to @1.0@ is used.

Since the result is random, calling the function twice will give a different answer.

--Parameters--
! Parameter	Type		Default		Description
| @begin@	[[type:double]]	@0.0@		Lower end point of the range the number will be in.
| @end@		[[type:double]]	@1.0@		Upper end point of the range the number will be in.

--Examples--
> random_real() == 0.1451651461
> random_real() == 0.7521351365
> random_real(begin:100, end:200) == 193.2914351341

--See also--
| [[fun:random_int]]		Generate a random [[type:int|integer number]].
