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)

Misconceptions about Operator

30 documented Misconceptions

ArithmeticPlusPrecedes

Addition has higher precedence than string concatenation

ArrayAccessWithParentheses

Parentheses are used to access an element in an array

AssignCompares

= compares two values

AssignmentNotExpression

An assignment a=b is not an expression

CannotChainMemberAccesses

Member accesses cannot be chained together

CannotChainMemberToConstructor

Method calls or field accesses cannot be chained to a constructor invocation

ComparisonWithBooleanLiteral

To test whether an expression is true or false, one must compare it to true or to false

EqualityOperatorComparesObjectsValues

o==p compares the objects referred to by variables o and p

MapToBooleanWithConditionalOperator

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

NoAtomicExpression

Expressions must consist of more than one piece

NoShortCircuit

&& and || always evaluate both operands

NoSingleLogicAnd

& is only a bitwise AND

PreIncrementBeforeLoop

Pre-increment in update part of for loop means increment before loop body

RightToLeftChaining

Chained accesses are invoked from right to left

StringPlusStringifiesExpression

String concatenation stringifies non-String operand expressions