Grater than,Less than and Equal to are the three decisions making operations performed by the ALU of a computer.
The greater-than sign is a mathematical symbol that denotes an inequality between two values. Since the development of computer programming languages, the greater-than sign and the less-than sign have been repurposed for a range of uses and operations.
Greater than and less than comparison of non-numeric data is performed according to a sort convention (such as, for text strings, lexicographical order) which may be built into the programming language and/or configurable by a programmer.
In programming languages == sign or double equal sign means we are comparing right side with left side, and this comparison returns true or false, We usually use this comparison inside if condition to do something specific.