Unary Operators

Syntax

• void expression; // Evaluates expression and discards return value
• +expression; // Attempt to convert expression to a number
• delete object.property; // Delete object’s property
• delete object[“property”]; // Delete object’s property
• typeof operand; // Returns type of operand
• ~expression; // Perform NOT operation on each bit of expression
• !expression; // Perform logical negation on expression
• -expression; // Negate expression after attempting conversion to number

Overview

The typeof operator

The delete operator

The unary plus operator

The void operator

The unary negation operator (-)

he bitwise NOT operator

The logical NOT operator