Operator

An operator is a symbol or keyword in source code that represents a built-in function.

Related concepts:  Function

Closest Wikipedia entry:  Operator (computer programming) — In computer programming, operators are constructs defined within programming languages which behave generally like functions, but which differ syntactically or semantically. Common simple examples include arithmetic (e.g. addition with +), comparison (e.g. "greater than" with >), and logical operations (e.g. AND, also written && in some languages). More involved examples include assignment (usually = or :=), field access in a record or object (usually .), and the scope resolution operator (often :: or .).

Misconceptions about Operator

28 documented Misconceptions

AssignCompares

= compares two values

CannotChainAttributeToObjectInstantiation

Method calls, and attribute accesses in general, cannot be chained to a constructor invocation.

ComparisonWithBoolLiteral

To test whether an expression is True or False, one must compare it to True or to False

MapToBooleanWithTernaryOperator

To map a boolean expression to a bool, a ternary conditional operator is necessary

NoAtomicExpression

Expressions must consist of more than one piece

NoShortCircuit

and/or always evaluate both operands

PlusConcatenatesNumbers

The plus operator can concatenate strings and numbers