Write a recursive function, len, that accepts a parameter that holds a string value, and returns the number of characters in the string. The length of the string is: 0 if the string is empy ("") 1 more than the length of the string beyond the first character

following are the method definition to this question:

def len (x) : #defining a method

if (x=="") : #defining condition that checks value store nothing

return 0# return value

else: # else block

return 1+len (x[1:]) #use recursive function and return value

print (len ('The collection of table')) #call method and prints its value

Output:

23

Explanation:

In the above method definition, a "len" method is declared, in which x variable accepts as its parameter, inside the method a condition block is used, which can be explained as follows:

In if block, we check the value is equal to null if this condition is true, it will return a value, that is 0. In this condition is false, it will go to else block in this block, the recursive method is used, which calculates value length and return its value.