Write a program to check if an input is a valid hashtag(starts with #, contains only letters, numbers, and underscore, no space or special characters).1)Name your program hashtag. c.2)The user input ends with the user pressing the enter key (a new line character).3)Library function isalpha(), isdigit(), and isalnum()arenot allowed inthis program.4)Use getchar() to read in the input.

This program reads a file called 'test.txt'. you are required to write two functions that build a wordlist out of all of the words found in the file and print all of the unique words found in the file. remove punctuations using 'string.punctuation' and 'strip()' before adding words to the wordlist. write a function build_wordlist() that takes a 'file pointer' as an argument and reads the contents, builds the wordlist after removing punctuations, and then returns the wordlist. another function find_unique() will take this wordlist as a parameter and return another wordlist comprising of all unique words found in the wordlist. example: contents of 'test.txt': test file another line in the test file output: ['another', 'file', 'in', 'line', 'test', 'the']

Which two technologies support the building of single-page applications?

Which one of the following functions is not available on the autosum tool? sum average if max