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Added in 1.9.0
$rand(v1,v2)
Returns a random number or letter between v1 and v2.
Same as $r.
See also $rands.
Parameters
Parameter | Description |
v1 | Start number or letter [0-9A-Za-z]. |
v2 | End number or letter [0-9A-Za-z]. |
if v1 and v2 are both numeric, returns random number in that range
otherwise returns a character in the range of characters v1 and v2
valid number range -2^63 through 2^63-1
Example
; Get a random number between 10 and 100. //echo -ag $rand(10,100) ; Get a random number between -10 and +10. //echo -ag $rand(10,-10) ; Get a random letter between g and y. //echo -ag $rand(g,y) ; Get a random character between A and z. Since 'A' is codepoint 65 and 'z' is codepoint 122, this includes non-alphanumeric codepoints 91-96 [\]^_` //echo -ag $rand(A,z) To obtain only the 52 case-insensitive characters: //echo -a $iif($rand(0,1),$rand(A,Z),$rand(a,z)) Numeric includes numbers at the beginning of strings. //echo -a $rand(1X,4X) is the same as $rand(1,4) Only 1st character of non-numeric string is used. //echo -a $rand(AB,CD) is in the range A through C No 'good' random number generator creates equal outcome of all numbers in the range, but they should be fairly close to the average //hfree -w test | hmake test | var %i 100000 | while (%i) { hinc test $rand(1,100)) | dec %i } | var %i 1 , %a | while (%i isnum 1-100) { var %a %a %i $+ = $+ $hget(test,%i) | inc %i } | echo -a %a
Updated by Per Amundsen over 1 year ago · 5 revisions