note when you work on projectit' good idea to use only single quotes or only double quotes to delimit every string keep in mind that there really isn' right or wrong choicethe goal is to be consistent because consistency helps make your code easier to read and understand strings can contain any valid unicode character for examplethe string "we're # !contains the pound sign (#and " contains numbers "xpythongxis also valid python stringdetermine the length of string the number of characters contained in stringincluding spacesis called the length of the string for examplethe string "abchas length of and the string "don' panichas length of python has built-in len(function that you can use to determine the length of string to see how it workstype the following into idle' interactive windowlen("abc" you can also use len(to get the length of string that' assigned to variableletters "abclen(letters firstyou assign the string "abcto the variable letters then you use len(to get the length of letterswhich is