for

for loop is a versatile and powerful construct. Here is the common form of the for statement.

for (initialization; condition; iteration){

/ / body

}

If only one statement is being repeated, there is no requirement for the curly braces.  A for loop operates as follows. Whenever the loop first begins, the initialization portion of the loop is executed.   Commonly, this is an expression which sets the value of the loop control variable that acts as a counter which controls the loop. It is important to understand in which the initialization expression is only executed at one time.

Nest, condition is evaluated. This has to be a boolean expression.  It commonly tests the loop control variable against a goal value.  The body of the loop is executed if this expression is true. If it is flaps, the loop terminates. Further the integration portion of the loop is executed. The loop then iterates, first evaluating the conditional expression after that executing the body of the loop and then executing the iteration expression along with each pass. This procedures repeats until the controlling expression is false.

Here is a version of the "tick" program which uses a for loop.

/ / demonstrate for loop.

class ForTick  {

public static void main (String atgs [ ] 0 {

int n ;

for (n=10; n>0; n - - )

System.out.println ("tick" + n)

}

}