Control Statements
Loops
for

The syntax of the for loop


for(initializationExpression;
	booleanExpression;
	incrementExpression)
{
    statements
}

How to code for loops

A for loop is useful when you need to increment or decrement a counter that determines how many times the loop is executed.
Within the parentheses of a for loop, you code:

an initialization expression that gives the starting value for the counter
a Boolean expression that determines when the loop ends
an increment expression that increments or decrements the counter

The loop ends when the Boolean expression is false.
You can declare the counter variable before the for loop. Then, this variable will be in scope after the loop finishes executing.

A for loop that stores the numbers 0 through 4 in a string

With a single statement

String numbers = "";
for (int i = 0; i < 5; i++)
    numbers += i + " ";

With a block of statements

String numbers = "";
for (int i = 0; i < 5; i++)
{
    numbers += i;
    numbers += " ";
}

A for loop that adds the numbers 8, 6, 4, and 2


int sum = 0;
for (int j = 8; j > 0; j -= 2)
{
    sum += j;
}
A for loop that calculates a future value
for (int i = 1; i <= months; i++)
{
    futureValue = (futureValue + monthlyPayment) *
        (1 + monthlyInterestRate);
}