WS Form has two functions that can be used to create random numbers and string.
Note: These functions use standard PHP and JavaScript random number generators, do not generate cryptographically secure values, and therefore should not be used for cryptographic purposes.
Random Numbers
The parse variable used to create a random number is:
#random_number(min, max)
Demo
Random Strings
The parse variable used to create a random string is:
#random_string(length, characters)
Examples: