javascript break specifies tag to break multi-layer loop example_javascript skills

When I was reading the authoritative guide to JavaScript today, I found that there are two types of break syntax (break; and break label;). . . I never looked carefully before, it was just on the first few pages.

But I didn’t understand how to write label, so I checked online and found an example

Copy code Code As follows:

function foo ()
{
dance:
for(var k = 0; k < 4; k ){
for(var m = 0; m < 4; m ){
if(m == 2){
break dance;
}
}
}
}

This way you can break the entire loop nest directly! !

(The breaks in c and java are all like this, so you don’t study seriously...)