The "less than" symbol (<) is used to express a lower value. For example, if (x < 10) means "if X is less than 10." See greater than symbol. THIS DEFINITION IS FOR ...

There are 118 elements in the periodic table, each with a unique symbol and atomic number. Symbol: A one or two-letter abbreviation used to represent the element. Atomic number: The number of ...

The "greater than" is also used to close HTML and XML tags, while the "less than" (<) symbol is used to begin them, as in the following examples: THIS DEFINITION IS FOR PERSONAL USE ONLY.