>> help testit

  testit.m
  
  getinput has 4 input parameters:
  1) string to prompt user with (' enter a value between 2 and 4')
  2) maximum number of attempts for the user to enter a value (5)
  3) the smallest value that is valid (2)
  4) the largest value that is valid (4)
 
  getinput has 2 output parameters:
  1) val (the value that was obtained from the user)
  2) okay (a logical flag set true if a valid input obtained in maxtries
          attempts; else false)
  

>> help getinput

  this function will prompt the user for a "value" using
  the prompt in "str_prompt".  the user will be prompted
  a "maxtries" number of times to obtain a "value" between
  "maxval" and "minval"
 

>> testit

 enter a value between 2 and 42

val =

     2


okay =

     1

 val = 2
>> testit

 enter a value between 2 and 43

val =

     3


okay =

     1

 val = 3
>> testit

 enter a value between 2 and 41
invalid input, try again

 enter a value between 2 and 49
invalid input, try again

 enter a value between 2 and 48
invalid input, try again

 enter a value between 2 and 47
invalid input, try again

val =

     7


okay =

     0

sorry you did not enter a valid number
>> exit