<html> <head> <link rel="stylesheet" href="style.css" type="text/css"> <link rel="Start" href="index.html"> <link rel="previous" href="Queue.html"> <link rel="next" href="Scanf.html"> <link rel="Up" href="index.html"> <link title="Index of types" rel=Appendix href="index_types.html"> <link title="Index of exceptions" rel=Appendix href="index_exceptions.html"> <link title="Index of values" rel=Appendix href="index_values.html"> <link title="Index of modules" rel=Appendix href="index_modules.html"> <link title="Index of module types" rel=Appendix href="index_module_types.html"> <link title="Arg" rel="Chapter" href="Arg.html"> <link title="Arith_status" rel="Chapter" href="Arith_status.html"> <link title="Array" rel="Chapter" href="Array.html"> <link title="ArrayLabels" rel="Chapter" href="ArrayLabels.html"> <link title="Big_int" rel="Chapter" href="Big_int.html"> <link title="Bigarray" rel="Chapter" href="Bigarray.html"> <link title="Buffer" rel="Chapter" href="Buffer.html"> <link title="Callback" rel="Chapter" href="Callback.html"> <link title="CamlinternalOO" rel="Chapter" href="CamlinternalOO.html"> <link title="Char" rel="Chapter" href="Char.html"> <link title="Complex" rel="Chapter" href="Complex.html"> <link title="Condition" rel="Chapter" href="Condition.html"> <link title="Dbm" rel="Chapter" href="Dbm.html"> <link title="Digest" rel="Chapter" href="Digest.html"> <link title="Dynlink" rel="Chapter" href="Dynlink.html"> <link title="Event" rel="Chapter" href="Event.html"> <link title="Filename" rel="Chapter" href="Filename.html"> <link title="Format" rel="Chapter" href="Format.html"> <link title="Gc" rel="Chapter" href="Gc.html"> <link title="Genlex" rel="Chapter" href="Genlex.html"> <link title="Graphics" rel="Chapter" href="Graphics.html"> <link title="GraphicsX11" rel="Chapter" href="GraphicsX11.html"> <link title="Hashtbl" rel="Chapter" href="Hashtbl.html"> <link title="Int32" rel="Chapter" href="Int32.html"> <link title="Int64" rel="Chapter" href="Int64.html"> <link title="Lazy" rel="Chapter" href="Lazy.html"> <link title="Lexing" rel="Chapter" href="Lexing.html"> <link title="List" rel="Chapter" href="List.html"> <link title="ListLabels" rel="Chapter" href="ListLabels.html"> <link title="Map" rel="Chapter" href="Map.html"> <link title="Marshal" rel="Chapter" href="Marshal.html"> <link title="MoreLabels" rel="Chapter" href="MoreLabels.html"> <link title="Mutex" rel="Chapter" href="Mutex.html"> <link title="Nativeint" rel="Chapter" href="Nativeint.html"> <link title="Num" rel="Chapter" href="Num.html"> <link title="Obj" rel="Chapter" href="Obj.html"> <link title="Oo" rel="Chapter" href="Oo.html"> <link title="Parsing" rel="Chapter" href="Parsing.html"> <link title="Pervasives" rel="Chapter" href="Pervasives.html"> <link title="Printexc" rel="Chapter" href="Printexc.html"> <link title="Printf" rel="Chapter" href="Printf.html"> <link title="Queue" rel="Chapter" href="Queue.html"> <link title="Random" rel="Chapter" href="Random.html"> <link title="Scanf" rel="Chapter" href="Scanf.html"> <link title="Set" rel="Chapter" href="Set.html"> <link title="Sort" rel="Chapter" href="Sort.html"> <link title="Stack" rel="Chapter" href="Stack.html"> <link title="StdLabels" rel="Chapter" href="StdLabels.html"> <link title="Str" rel="Chapter" href="Str.html"> <link title="Stream" rel="Chapter" href="Stream.html"> <link title="String" rel="Chapter" href="String.html"> <link title="StringLabels" rel="Chapter" href="StringLabels.html"> <link title="Sys" rel="Chapter" href="Sys.html"> <link title="Thread" rel="Chapter" href="Thread.html"> <link title="ThreadUnix" rel="Chapter" href="ThreadUnix.html"> <link title="Tk" rel="Chapter" href="Tk.html"> <link title="Unix" rel="Chapter" href="Unix.html"> <link title="UnixLabels" rel="Chapter" href="UnixLabels.html"> <link title="Weak" rel="Chapter" href="Weak.html"><title>Random</title> </head> <body> <div class="navbar"><a href="Queue.html">Previous</a> <a href="index.html">Up</a> <a href="Scanf.html">Next</a> </div> <center><h1>Module <a href="type_Random.html">Random</a></h1></center> <br> <pre><span class="keyword">module</span> Random: <code class="type">sig end</code></pre><div class="info"> Pseudo-random number generator (PRNG).<br> </div> <hr width="100%"> <pre><span class="keyword">val</span> <a name="VALinit"></a>init : <code class="type">int -> unit</code></pre><div class="info"> Initialize the generator, using the argument as a seed. The same seed will always yield the same sequence of numbers.<br> </div> <pre><span class="keyword">val</span> <a name="VALfull_init"></a>full_init : <code class="type">int array -> unit</code></pre><div class="info"> Same as <a href="Random.html#VALinit"><code class="code"><span class="constructor">Random</span>.init</code></a> but takes more data as seed.<br> </div> <pre><span class="keyword">val</span> <a name="VALself_init"></a>self_init : <code class="type">unit -> unit</code></pre><div class="info"> Initialize the generator with a more-or-less random seed chosen in a system-dependent way.<br> </div> <pre><span class="keyword">val</span> <a name="VALbits"></a>bits : <code class="type">unit -> int</code></pre><div class="info"> Return 30 random bits in a nonnegative integer.<br> </div> <pre><span class="keyword">val</span> <a name="VALint"></a>int : <code class="type">int -> int</code></pre><div class="info"> <code class="code"><span class="constructor">Random</span>.int bound</code> returns a random integer between 0 (inclusive) and <code class="code">bound</code> (exclusive). <code class="code">bound</code> must be more than 0 and less than 2<sup class="superscript">30</sup>.<br> </div> <pre><span class="keyword">val</span> <a name="VALfloat"></a>float : <code class="type">float -> float</code></pre><div class="info"> <code class="code"><span class="constructor">Random</span>.float bound</code> returns a random floating-point number between 0 (inclusive) and <code class="code">bound</code> (exclusive). If <code class="code">bound</code> is negative, the result is negative. If <code class="code">bound</code> is 0, the result is 0.<br> </div> <pre><span class="keyword">val</span> <a name="VALbool"></a>bool : <code class="type">unit -> bool</code></pre><div class="info"> <code class="code"><span class="constructor">Random</span>.bool ()</code> returns <code class="code"><span class="keyword">true</span></code> or <code class="code"><span class="keyword">false</span></code> with probability 0.5 each.<br> </div> <br><code><span class="keyword">type</span> <a name="TYPEstate"></a>state </code> <div class="info"> Values of this type are used to store the current state of the generator.<br> </div> <br> <pre><span class="keyword">val</span> <a name="VALget_state"></a>get_state : <code class="type">unit -> <a href="Random.html#TYPEstate">state</a></code></pre><div class="info"> Returns the current state of the generator. This is useful for checkpointing computations that use the PRNG.<br> </div> <pre><span class="keyword">val</span> <a name="VALset_state"></a>set_state : <code class="type"><a href="Random.html#TYPEstate">state</a> -> unit</code></pre><div class="info"> Resets the state of the generator to some previous state returned by <a href="Random.html#VALget_state"><code class="code"><span class="constructor">Random</span>.get_state</code></a>.<br> </div> </body></html>