[This is preliminary documentation and subject to change]
Executes a block of statements for as long as a specified condition is true.
for (initialization; test; increment)
statements
initialization
Required. An expression. This expression is executed only once, before the loop is executed.
test
Required. A Boolean expression. If test is true, statement is executed. If test if false, the loop is terminated.
increment
Required. An expression. The increment expression is executed at the end of every pass through the loop.
statements
Optional. One or more statements to be executed if test is true. Can be a compound statement.
You usually use a for loop when the loop is to be executed a known number of times.
The following example demonstrates a for loop.
/* i is set to 0 at start, and is incremented by 1 at the end
of each iteration. Loop terminates when i is not less
than 10 before a loop iteration. */
var myarray = new Array();
for (i = 0; i < 10; i++) {
myarray[i] = i;
}