# Verifying first digit in string python

I am brand new to python and have searched the site on this, but still can't figure it out. It's for a homework assignment, so not looking for the answer, but I can't figure out what I'm doing wrong and getting a syntax error (I'm stuck on the first rule...)

The assignment: W?e will assume that the credit card number is a string consisting of 14 characters and is in the format ####-####-####, including the dashes, where â€˜#â€™ represents a digit between 0-9, so that there are 12 digits overall. 1. The first digit must be a 4. 2. The fourth digit must be one greater than the fifth digit; keep in mind that these are separated by a dash since the format is ####-####-####. 3. The sum of all digits must be evenly divisible by 4. 4. If you treat the first two digits as a two-digit number, and the seventh and eighth digits as a two-digit number, their sum must be 100.

Here is my code so far. I've read that you can't compare characters to numbers, but nothing I've tried has worked. Any help/guidance would be appreciated!

```
def verify(number) :
if input ['0'] == '4'
return True
if input ['0'] != '4'
return "violates rule #1"
input = "4000-0000-0000" # change this as you test your function
output = verify(input) # invoke the method using a test input
print(output) # prints the output of the function
```

To get the first character of a string, use `text[0]`

, not `text['0']`

.

### 1 Answer

your code is fine, but there are a couple of issues

```
def verify(number) :
if input [0] == '4':
return True
if input [0] != '4':
return "violates rule #1"
input = "4000-0000-0000" # change this as you test your function
output = verify(input) # invoke the method using a test input
print(output) # prints the output of the function
```

first of all, indentation matters in python, everything that belongs in your function definition should be indented.

second, if statements should be followed by `:`

. that is all

Your indentation is incorrect. Please fix that and post the full traceback.