Repetition dan Selection

Repetition & selection  adalah perintah-perintah yang digunakan untuk menguji maupun mengulangi satu atau lebih statement.

Perintah Selection ada 3 jenis : If-Else, Switch-case dan Ternary Operator

1. Contoh IF-Else :

Syntax :
if (boolean expression) statement1;
else statement2;

atau
if (boolean expression){
   statement1;
   statement2; Block statement1
   ……
}
else {
   statement3;
   statement4; Block statement2
   …
}

2. Contoh Switch-case :

Syntax:

switch (expression) {

case constant1 : statements1; break; 

.

.

case constant2 : statements2; break;

default : statements;

}

3. Contoh Ternary Operator :

Syntax:

condition ? then-expression : else-expression

Using this operator, you can rewrite

if(a > b)

max_value = a;

else

max_value = b;

as

max_value = (a > b) ? a : b;

Perintah Repetition Repetition/looping ada 3 jenis, yaitu : for, while, do-while

1. Contoh lopping for :

Syntax :

for(exp1; exp2; exp3) statement;

or:

for(exp1; exp2; exp3){

statement1;

statement2;

…….

 }

exp1 :  initialization

exp2 :  conditional 

exp3 :  increment or decrement 

exp1, exp2 and exp3 are optional

2. Contoh looping while :

Syntax :

while (exp) statements;

or:

while(exp){

statement1;

statement2;

   …..

}

3. Contoh looping do-while :

Syntax :

do{

    < statements >;

} while(exp);

Keep executing while exp is true 

exp evaluation done after executing the statement(s