if

Purpose

This sets up a test condition which can be used to control the subsequent action of the computer.

Examples

if (month==12) println 'December'
if (a==1) println 'One' else println 'Not one'
if (answer=='Banana') fruit()
if (height < 1.94 || age < 18) notAllowedOnThisRide()
if (length != 5) tooShort()
if (rate == 5) {y=6;z=8} else println 'Wrong rate'
if (month == 11) {if (day == 5) println 'Guy Fawkes'}
if (month == 1 && day == 1) println 'New Year'
if (x) y=0   // x is zero or null

Description

A statement forming part of the if...else structure. The word else is optional.

Syntax

if (conditionalExpression) statement
if (conditionalExpression) {statements}

Associated keywords

else