| Keyword | Definition |
|---|---|
| append | adding a new value on to the end of a list |
| concatenate | adding new characters on to the end of a string |
| in | keyword in python which allows you to check if a value is in a list or a character is in a string |
| index | the position within a list or string that you want to look at (where 0 is the first position) |
| indexing expression | a combination of values, variables, function calls and operators which can work out the index of a list or string you want to look at |
| len | built in python function which finds the length of a list or string by counting how many values of characters it stores |
