rand EXPR
rand
Returns a random fractional number between 0 and the value of EXPR.
(EXPR should be positive.) If EXPR is omitted, returns a value between
0 and 1. This function produces repeatable sequences unless srand()
is invoked. See also srand().
(Note: if your rand function consistently returns numbers that are too
large or too small, then your version of Perl was probably compiled
with the wrong number of RANDBITS. As a workaround, you can usually
multiply EXPR by the correct power of 2 to get the range you want.
This will make your script unportable, however. It's better to recompile
if you can.)
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