AJAX - The Complete Reference

PART IV

Appendix A: JavaScript Quick Reference 577

Loops

JavaScript supports familiar loop forms including:

for ( [initStatement(s)] ; [logicalExpression(s)] ; [iterationStatement(s)] )

statement or block

while ( expression )

statement or block

do

statement or block

while ( expression );

All three loops are demonstrated here:

for (var i=0; i < 10; i++)

{

document.write(i+"<br />");

}

var i = 0;

while (i < 10)

{

document.write(i+"<br />");

i++;

}

var i = 0;

do

{

document.write(i+"<br />");

i++;

} while (i < 10);

The break and continue statements are commonly found in loop bodies and are

discussed in the next section.

Labeled Statements, Break, and Continue

Statements can be labeled using:

label: statement(s)

Jump to labeled statements in a block using either:

break label;

continue label;

Otherwise:

• break exits the loop, beginning execution following the loop body.


• continue skips directly to the next iteration (“top”) of the loop.