#We've started a recursive function below called #measure_string that should take in one string parameter, #myStr, and returns its length. However, you may not use #Python's built-in len function. # #Finish our code. We are missing the base case and the #recursive call. # #HINT: Often when we have recursion involving strings, we #want to break down the string to be in its simplest form. #Think about how you could splice a string little by little. #Then think about what your base case might be - what is #the most basic, minimal string you can have in python? # #Hint 2: How can you establish the base case has been #reached without the len() function? #You may not use the built-in 'len()' function.

Here is the Python program:  

def measure_string(myStr): #function that takes a string as parameter  

 if myStr == '': #if the string is empty (base case)  

      return 0  #return 0  

  else: #if string is not empty  

      return 1 + measure_string(myStr[0:-1]) #calls function recursively to find the length of the string (recursive case)  

#in order to check the working of the above function the following statement is used    

print(measure_string("13 characters")) #calls function and passes the string to it and print the output on the screen      

Explanation:

The function works as following:  

Suppose the string is 13 characters  

myStr = "13 characters"  

if myStr == '': this is the base case and this does not evaluate to true because myStr is not empty. This is basically the alternate of  

if len(myStr) == 0: but we are not supposed to use len function here so we use if myStr == '' instead.  

So the program control moves to the else part  

return 1 + measure_string(myStr[0:-1])  this statement is a recursive call to the function measure_string.  

myStr[0:-1] in the statement is a slice list that starts from the first character of the myStr string (at 0 index) to the last character of the string (-1 index)  

This statement can also be written as:  

return 1 + measure_string(myStr[1:])

or  

return 1 + measure_string(myStr[:-1])  This statement start from 1st character and ends at last character  

This statement keeps calling measure_string until the myStr is empty. The method gets each character using a slice and maintains a count by adding 1 each time this statement is returned.The function breaks string into its first character [0:] and all the rest characters [:-1]. and recursively counts the number of character occurrences and add 1. So there are 13 characters in the example string. So the output is:  

13

the answer would be 2

since they are only saying that the couple has 20 daughters and so on but they never said that they went to the movies as well therefore the couple was the only people that went to the movies.

hope this ! : 3