CSIS 110 - Lecture 15
Announcements
Quiz – Monday, Oct. 3
Read: Chapter 4, sections 4.11 and 4.12 (pages 100 – 110)
Last time: For loops
for ( ForInit; ForExpression; ForUpdate )
Statement
Draw flowchart, using above labels. Then redraw using below example.
int value = 1;
for ( int i = 0; i < 5; i++ ) {
System.out.println( value );
value *= 2;
}
Another example:
double money = 100;
double interest = .05;
int year;
for ( year = 1; year <= 20; year++ ) {
money *= 1 + interest;
}
S.O.PL("You have $"+ money + " after 20 years.");
Remember, loop control variable does not have to increase, and it does not have to
change its value by 1.
for ( int count = 20; count > 0; count -= 7 ) {
System.out.println( count );
}
Operators +=, -=, *=, /=, %=
In our programs, we frequently use a variable, add a value to it, and assign the result back
into the original variable:
valueSum = valueSum + value;
