# Operator

An operator is a symbol within a mathematical expression that defines a specific operation. For example, the plus symbol (+) is an operator that represents addition.

Common operators include:

• - (subtract)
• * or x (mulitply)
• / or ÷ (divide)
• % or mod (modulus)

Consider the calculation:

### 2 + 3 x 4 = 14

In the expression above, + and x are operators, while the numbers 2, 3, and 4 are operands. 14 is the result (since the x operand takes precedence over the + operand).

While operands are typically associated with mathematics, they also apply to computer science. For example, the function below contains two operators and three operands.

``````halfPlusSeven(x)
{
\$total = \$x / 2 + 7;
return \$total;
}``````

The / and + symbols are operators, while the variable \$x and the numbers 2 and 7 are operands. If x = 30, the expression will evaluate as (30 / 2) + 7, which will return a result of 22.

What is the purpose of a firewall?

A
It prevents viruses from running on an operating system
0%
B
It requires authorization before a user can access a server
0%
C
It restricts traffic to and from a certain network or computer system
0%
D
It prevents computers within a network from communicating with each other
0%
Correct! Incorrect!     View the Firewall definition.
More Quizzes →

## The Tech Terms Computer Dictionary

The definition of Operator on this page is an original definition written by the TechTerms.com team. If you would like to reference this page or cite this definition, please use the green citation links above.

The goal of TechTerms.com is to explain computer terminology in a way that is easy to understand. We strive for simplicity and accuracy with every definition we publish. If you have feedback about this definition or would like to suggest a new technical term, please contact us.