Think of a tool, like a hammer or a screwdriver. Its handle must have the correct shape for a comfortable and strong grip; a handle that's too thick, too thin,

Think of a tool, like a hammer or a screwdriver. Its handle must have the correct shape for a comfortable and strong grip; a handle that's too thick, too thin, or oddly shaped, will be hard to use. The tool's shape must not force you to hold it in a strange position. The tool's length must be adequate for the task; neither too long, nor too short. Now apply that to a software tool, like a compiler.