Basic Examples

Create a random string of length 8:

○
RandomString
[8]
In[]:=
joepcdze
Out[]=

Create multiple random string simultaneously:

○
RandomString
[{3,8}]
In[]:=
{wqueigvq,zwrfyjcj,wztdausl}
Out[]=

Randomly choose from a set of characters:

○
RandomString
[{"a","d","e","n","r","s"},10]
In[]:=
drenerndra
Out[]=

Scope

Randomly choose from a set of characters using weights:

○
RandomString
[{1,1,1,10,1,1}{"a","d","e","n","r","s"},20]
In[]:=
annnnnnndenrnddnrana
Out[]=

Use an alphabet entity:

○
RandomString
Russian
ALPHABET
,10
In[]:=
нееъвбввщг
Out[]=

Use an language entity:

○
RandomString
Greek
LANGUAGE
,10
In[]:=
υενκγψθουδ
Out[]=

Use a preset of characters:

○
RandomString
["UpperCase",20]
In[]:=
NTLZEDXFLAHGUIIJDYDY
Out[]=

Generate an array of strings of length 4:

r=
○
RandomString
[{5,3,2,4}]
In[]:=
{{{pepc,nfix},{tqug,jnam},{avdb,iufs}},{{zdef,wbam},{luto,rsog},{xutr,sjow}},{{ayie,vsrk},{ofqx,synp},{kxru,ihsl}},{{qqfj,hefh},{kctg,nqpi},{iden,pwma}},{{nbwj,dxwa},{gdew,qbnp},{oxvq,guma}}}
Out[]=

The dimensions of the output is
Most
[dimensions]
:

Dimensions[r]===Most[{5,3,2,4}]
In[]:=
True
Out[]=

Arbitrary characters can be used:

○
RandomString
[CharacterRange[1000,1020],100]
In[]:=
ϴϬϹϲϱϸ϶ϹϺ϶ϲϼϸϹϹϺϪϹϱϮϬϹϨϭϯϪϸϻϪϰϬϫϺϻϸϴϱϮϰϻϲϼϨϳϴ϶ϹϺϴϫϬϮϺϼϱϩϪϲϳϼϰϺϮ϶ϹϳϰϵϭϷϬϳϼϯϵϬ϶ϻϩϸϵϰϼϸϵϬϨϯϮϮϬϭϯϩϸϼϵϲϳϪ
Out[]=

Applications

Create a random password:

StringRiffle
○
RandomString
["LowerUpperCaseNumbers",{4,5}],"-"
In[]:=
BGozr-ZmzjF-cFKC8-VnOsP
Out[]=

Create a random password excluding commonly mistyped characters (0 and o and O etc.):

StringRiffle
○
RandomString
[{"a","b","c","d","e","f","g","h","j","k","m","n","p","q","r","s","t","u","v","w","x","y","z","A","B","C","D","E","F","G","H","J","K","M","N","P","Q","R","S","T","U","V","W","X","Y","Z","2","3","4","5","6","7","8","9"},{4,5}],"-"
In[]:=
3UvHP-zDnbZ-VFMnX-Mk4Zx
Out[]=

Create a random bogus sentence:

CapitalizeStringRiffle
○
RandomString
/@RandomChoice[{1,2,2,2,1}{3,4,5,6,7},20],{""," ","."}
In[]:=
Fxqki ijda bjaoog slaskj tciei iunll gwkna kwlg izghyuv qowmrq ghhxom gceiz sfmdeh sajsu ddxaoto bmpvyi mfiyam jlodcr fqzwd wqbea.
Out[]=

Properties and Relations

Alphabet or language entities can be given:

SeedRandom[1];
○
RandomString
Dutch
LANGUAGE
,100
In[]:=
zfahacdavaqxoditfsqmatewvhdaeuydfmtvivylijijcdkecxrlpgmkzcwkzesmoijmelmcfugkyfhsfckoijveprewigydundbrudl
Out[]=
SeedRandom[1];
○
RandomString
Dutch
ALPHABET
,100
In[]:=
zfahacdavaqxoditfsqmatewvhdaeuydfmtvivylijijcdkecxrlpgmkzcwkzesmoijmelmcfugkyfhsfckoijveprewigydundbrudl
Out[]=

Possible Issues

Some languages have multicharacter letters in their alphabet, such that the supplied length might differ from the result:

If the input contains multi-character letters the length might be different than expected: