Operating on variables

Operators apply simple operations such as addition and multiplication to operands such as numbers. They usually return a new value that is the result of the operation.

Most operators are binary, meaning that they work on two operands, as shown in the following pseudocode:

var resultOfOperation = firstOperand operator secondOperand; 

Some operators are unary, meaning they work on a single operand, as shown in the following pseudocode:

var resultOfOperation = onlyOperand operator;

A ternary operator works on three operands, as shown in the following pseudocode:

var resultOfOperation =
  firstOperand firstOperator secondOperand secondOperator thirdOperand;

Experimenting with unary operators

Two common unary...