If/ElseandCaseStatements
TabithaPeckM.S. COMP110 February4,2008
MWF33:50pm Philips367
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Announcements
NewHomeworkPolicy
Grades
Incorrectsubmissions==losealettergrade Threeincorrectsubmissions==zerocredit Check.jarfilesBEFOREyousendthem Seemeifyouarestillhavingproblems Lab1,Lab2,Project1 PostingGradesonline? Handingbackgrades?
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Questions?
FromLab2
Norealproblems Nevergotthesameproblemtwice
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Gotcha==
var1=var2(assignmentstatement)
var1==var2(booleanexpression) DoNOTuse==tocompareStrings
Error!!!!!!!
string1==string2//BAD
string1.equals(string2);//GOOD
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Gotcha(Syntax)
if(booleanexpression);
DO NOT DO THIS!!!!!!!
TodayinCOMP110
Moreif/elsestatements Casestatements
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Tracingif/elsecode
I give you code and input You give me output
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Example
input = 5?
input = 6?
int days = 0; if (input < 6) System.out.print(I worked + input + days this week); else { days = 6 input + 1; System.out.print(I worked + + days days of overtime); }
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AnotherExample
Writetheif/elsepartofaprogramthat determinesifapersonisoldenoughto votebasedontheirage.Ifthepersonis oldenoughtovote,askiftheyarevoting inthedemocratorrepublicanprimary, andtheniftheyarevotingforObamaor Clinton,orMcCainorRomney.
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SwitchStatements
switch (numOfSiblings) Controlling expression { integer or char ONLY! case 0: System.out.print(An only child); break; case 1: Case System.out.print(Just one you say); break; Break label statement case 2: System.out.print(Two siblings!); break; case 3: System.out.print(Big family!); break; default: System.out.print(I dont believe you); break; } 10
PracticewithSwitchstatements
Writeaswitchstatementthattakesas controllingexpressionyouryearincollege (asinint)andoutputsyouryearincollege asfreshman,sophomore,junior,senior, orsupersenior
Shorthandforif/else
if(n1>n2) else
max=n1; max=n2;
max=(n1>n2)?n1:n2;
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Wednesday
Read3.2 LoopStatements
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