For() loop parameter call order

for( expression 1; expression 2; expression 3)
{
     Loop body statement ;
}

expression 1： Initialization statement

expression 2： Judgment conditional statement

expression 3： Control condition statement

A. Call the expression first 1, Initialize variable ;

B. Call the expression again 2, Judge whether the variable meets the condition ,True Then continue ,flase End cycle ;

C. Execute loop statement ;

D. Call expression 3,B,C,D,B··········（ loop ）

Print the postage price list , Output 20kg Postage price list for items within , The postage calculation rules are as follows :

1kg within 6 element .
exceed 1kg, Every increase 1kg charge an additional 2 element .