# Method Crypto.Substitution()->set_null_chars()

Method set_null_chars

  ``this_program` set_null_chars(`int`|`float` `p`, `array`(`string`) `chars`)`

Description

  Set null characters (fillers). Characters from `chars` will be inserted into the output stream with a probability `p`.

Parameter `p`

  A float between 0.0 and 1.0 or an integer between 0 and 100.

Parameter `chars`

  An array of one character strings.