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.

Assume that you have an array of integers named a. which of these code segments print the same results? int i = 1; while(i < a. length) { system. out. println(a[i]); i++; } int i; for (i = 0; i < a. length; i++) { system. out. println(a[i]); } for (int i : a) { system. out. println(i); } i and ii only ii and iii only i and iii only all three print the same results. all three print different results.

What a backup plan that you have created in a event you encounter a situation

Which type of tab stop is most for weights and measurements?