i not defined. Meaning?

Question

def order(sentence):
number = 1
a = sentence.index(i)
for number in a:
return sentence[0]
"""elif number + 1 in sentence.index(i):
return sentence.index(number + 1)"""

I typed in this code but I keeping on getting i not defined. What's wrong here with the i?

Answer 1

You havent defined i. You have defined number but the program doesnt know what do you mean by 'i', so it cannot define 'a'

Answer 2

You forgot to define 'i'.
You are using it when searching the sentence:

a = sentence.index(i)

Python does not know the variable called 'i'.
If it is not supposed to be a variable but a string, put it inside quotes.

Answer 3

If you want to use the character i, write sentence.index('i') instead. As it is, Python thinks i is a variable name that has not been introduced yet. Hence the error message. Hope that helps :)

Answer 4

Thanks

Answer 5

How do I declare what I is