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Smalltalk permits conditional expressions with ifFalse:
messages instead of ifTrue: messages. Whenever an ifFalse:
message is sent to true, the block argument is ignored; whenever an
ifFalse: message is sent to false, the statements in the
block are evaluated. Thus, you can redefine the analyzeCalories
method defined in Segment 143 as follows:
Integer method definition • instance analyzeCalories self <= 1600 ifFalse: [Transcript show: 'You have had enough'; cr]. self >= 1200 ifFalse: [Transcript show: 'You need more'; cr] Workspace 1700 analyzeCalories. 1100 analyzeCalories Transcript You have had enough You need more