Introduction
Built-in Functions Common to Most Data Structures
Instruction
Nicely done! How about Question 2?
Exercise
Write a function named second_index(input_string, input_char) that returns the index of the second occurrence of input_char in input_string. If there is no such occurrence, return -1.
Stuck? Here's a hint!
First, you should find an index of first occurence, then slice the string:
input_string[first_occurrence+1:]
and find the index of the first occurrence of the letter in the sliced string. Then return the right result.
If input_char occurs only once in the string or doesn't appear at all, return -1.
