Ways of sharing information notes from up to down

Under which key category do the page up and page down keys fall? page up and page down keys fall under the keys category.

Write a program that prompts the user to input a string. the program then uses the function substr to remove all the vowels from the string. for example, if str = "there", then after removing all the vowels, str = "thr". after removing all the vowels, output the string. your program must contain a function to remove all the vowels and a function to determine whether a character is a vowel.

In which part of a professional email should you try to be brief, but highly descriptive?