monospace - Which fonts have the same width for every character?

I would like to have a font with all characters the same width.

For example, a W is wider than an i in most fonts ...Is there any font that has all characters equally wide?

Answer

The type style you're looking for is monospace. Wikipedia explains it well.

A monospaced font, also called a fixed-pitch, fixed-width, or non-proportional font, is a font whose letters and characters each occupy the same amount of horizontal space. [...]

Examples of monospaced fonts include Courier, Courier New, Lucida Console, Monaco, and Consolas. [...]

These days, just about every computer has one or both of these fonts: