Translations:User:Psychoslave//Lua reference manual translation stub/1625/en

The arguments m and n may be omitted, but if specified must be convertible to integers.

• With no arguments, returns a real number in the range $[0,1)$
• With one argument, returns an integer in the range $[1,m]$
• With two arguments, returns an integer in the range $[m,n]$