Mathematical logic symbol

Each of these symbols has more than one possible meaning, and are all used to state that two things are about equal (or equivalent in some way).

The equals sign (=), otherwise referred to as the equality sign or equal to sign or equal sign for short, is a symbol used to indicate equality. It looks like two parallel horizontal lines. Computers display the equals sign with the Unicode or ASCII character 003D (in hexadecimal).

Approximate symbol

There are several symbols that can be used to say items are "approximately the same," "similar to" or "about equal." Some of these symbols include: