What is the question?????
Answer:
You will use the keyword extern to declare a variable at any place. Though you can declare a variable multiple times in your C program, it can be defined only once in a file, a function, or a block of code. Explanation:
An operating system change that fixes bugs improves security or enhanced features is called update.
It is very important to update your operating system because having the latest software version means your computer or device will be not only be more secure but will also perform better and be more reliable.
A worm as a multicell organism, but a virus is a single cell.
