counting chars in string w/o len

[johneven]

Here's my homework assignment:

Write code to count the number of characters in original_str using for loop as a counter and assign the answer to a variable num_chars. Do NOT use the len function to solve the problem.

#Here's my attempt:

original_str = "The quick brown rhino jumped over the extremely lazy fox."
counter=0
for counter in range (original_str):
	counter = counter +  1
num_chars=counter
print(num_chars)

Here's error message:
TypeError: start must be a integer on line 3

[nilamo]

From an interactive prompt, you can type help(range) to see how it expects to be used. The short version, is that it expects a number of how many things you want in the range, so range(10) would generate a sequence of 10 digits, 0 through 9.

That's a whole lot of words to say that range() isn't where you should be with this assignment. Here's a hint, you can iterate over the string directly.

[ichabod801]

In addition to what Nilamo said, you want your loop variable to be different from the variable you are using to count the characters.