ColdFusion expressions consist of operands and operators. Operands are comprised of constants and variables, such as "Hello" or MyVariable. Operators, such as the string concatenation operator (&) or the division operator (/) are the verbs that act on the operands. ColdFusion functions also act as operators.

The simplest expression consists of a single operand with no operators. Complex expressions consist of multiple operands and operators. For example, the following statements are all ColdFusion expressions:

12
MyVariable
(1 + 1)/2
"father" & "Mother"
Form.divisor/Form.dividend
Round(3.14159)

For detailed information on using variables, see Using ColdFusion Variables. For detailed information on expressions and operators, see Using Expressions and Number Signs.