This program adds 3 numbers and prints their sum. This program adds the whole numbers from 1 to 50 and prints their sum. If the computer runs out of memory, it can't work. While they write in languages like QBasic, or more likely Visual Basic, the computer can't actually understand those languages. It needs special programs which translate the programmers's instructions into something called machine language.
Machine language is the only set of instructions that the computer can execute directly.
It is a set of 1's and 0's. The 1's and 0's are clustered together in groups of 8. Each place with a 1 or 0 in it is called a bit. The group of 8 bits is called a byte. To imagine what it is like to give a computer instructions, click to go to Intel Corporation's web site.