About the use of JavaScript Break and Continue statements
break statement is used to break out of the loop.
continue is used to skip an iteration in a loop.
Break Statement
We have already seen the break statement in previous chapters of this tutorial. It is used to break out of switch() statements.
The break statement can be used to break out of a loop.
After the continue statement jumps out of the loop, the code after the loop will continue to be executed (
if any):
Example
for (i=0;i<10;i++){
if (i==3)
{
break; }
x=x + "The number is " + i + "<br>";}
Try it »
Since this if statement is only one line of code, you can omit the curly braces:
for (i=0;i<10;i++){
if (i==3) break; x=x + "The number is " + i + "<br>";}Continue statement
continue statement interrupts the iteration in the loop if the specified condition and then continue with the next iteration in the loop. This example skips value 3:
Example
for (i=0;i<=10;i++){
if (i==3) continue; x=x + "The number is " + i + "<br>";}JavaScript Tags
As you saw in the chapter on switch statements, JavaScript statements can be tagged.
To label a JavaScript statement, precede the statement with a colon:
label:statements
break and continue statements are simply statements that break out of a block of code.
Syntax:
break labelname; continue labelname;
continue statements (with or without label references) can only be used within loops.
break statement (without label reference), can only be used in a loop or switch.
Referenced by tags, the break statement can be used to break out of any JavaScript code block:
Example
cars=["BMW","Volvo","Saab","Ford"];list:
{
document.write(cars[0] + "<br>");
document.write(cars[1] + "<br>");
document.write(cars[2] + "<br>");
break list; document.write(cars[3] + "<br>");
document.write(cars[4] + "<br>");
document.write(cars[5] + "<br>");
}
本文讲解了js循环语句中的break和continue 语句的使用方法，想要观看更多的相关知识请关注php中文网。Related recommendations:
JavaScript Switch statement Practical application method
About the use of jQuery ajax - ajax()
How to use jquery ajax to upload files Function
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