Pemrograman DasarControl Flow Statements:Repetition/Looping

PTIIK - UB*

StatementsControl flow statements regulate the order in which statements get executed.Kinds of control flow statements: Decision making:if-then statement if-then-else statement, switch-case statementRepetition/looping: while statementfor statementdo-while statementBranching statement:break statementcontinue statementreturn statement*

Three forms of repetition statements:while statementsfor statementsdo-while statements

*Repetition/Looping

Syntax:while (boolean_exp) statement;orwhile(boolean_exp){ statement1; statement2; ..}*boolean_expstatementstruefalsewhile statements

Example:while(product

break Exit from decision-making (switch) or repetition (for, while dan do-while)

continue Skips the current iteration of a for, while and do-while.*break dan continue

Example:

int x = 1; while(x5) break; }*Exit from the loopbreak

Example:*int x; for(x=1; x

Exercise*

ExerciseInput:Berapakah kue untuk si Rakus? AsumsiMisalkan jawaban pertanyaan di atas adalah 5Maka output-nya:Si Rakus melihat 5 kue, memakan 1, menyisakan 4Si Rakus melihat 4 kue, memakan 1, menyisakan 3Si Rakus melihat 3 kue, memakan 1, menyisakan 2Si Rakus melihat 2 kue, memakan 1, menyisakan 1Si Rakus melihat 1 kue, memakan 1, menyisakan piringnya

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SubmissionDeadline: 21 October 2012To: ismiarta@gmail.comSubject: [PROGDAS SI] Si RakusContent: Nama: NIM: Kelas: Table Source code *

for statementsYou use the basic for statement to loop over a range of values from beginning to end.

for (initialization-expression; loop-expression; update-expression) statement;

//or

for (initialization-expression; loop-expression; update-expression) { statement; }*

for (exp1; exp2; exp3)statement;

exp1: initialization-expressionexp2: loop-expression exp3: update-expression

The initialization-expression allows you to declare and/or initialize loop variables, and is executed only once.

Then the loop-expression of boolean or Boolean type is evaluated and if it is true the statement in the body of the loop is executed.

After executing the loop body, the update-expression is evaluated, usually to update the values of the loop variables, and then the loop-expression is reevaluated. This cycle repeats until the loop-expression is found to be false.

The presence of exp1, exp2, and exp3 are optional.*for statements

*exp1exp3statementsexp2for statements

*Example: for (x=1; x

Examples:

*int x;for(x=1; x=1; x--) System.out.println(x);for statements

exp1 and exp3 may consist of more than one expressions, separated by comma(s)Examples:*

int i,j; for(i=1, j=30; i

Infinite Loopfor(;;){ }

Contoh:

* int i = 0; for(;;){ i++; printf("%d ", i); if (i>=10) break; // break out of the loop } for statements

Equivalence of for and while:

*exp1; while(exp2){ statement1; statement2; . exp3 } for(exp1; exp2; exp3){ statement1; statement2; . } equivalentwhile and for

Equivalence of for and while:

Contoh:*

int x; for(x=1;x

ExerciseInput:Berapakah kue untuk si Rakus? AsumsiMisalkan jawaban pertanyaan di atas adalah 5Maka output-nya:Si Rakus melihat 5 kue, memakan 1, menyisakan 4Si Rakus melihat 4 kue, memakan 1, menyisakan 3Si Rakus melihat 3 kue, memakan 1, menyisakan 2Si Rakus melihat 2 kue, memakan 1, menyisakan 1Si Rakus melihat 1 kue, memakan 1, menyisakan piringnya

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