The Random statement requires a lower and higher numeric bound, and a variable to assign the result to, in the format

Random <lower> <higher> <variable>

• The variable gets set to an integer number between the lower and higher bounds, inclusive
• If the <higher> value is lower than the <lower> value, the two numbers are swapped

Random 5 10 val

#${val} contains one of 5, 6, 7, 8, 9, 10