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Lavrentiy Rubtsov 2022-05-27 20:07:25 +06:00 • committed by GitHub
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1-js/02-first-steps/13-while-for/article.md
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@ -162,10 +162,8 @@ for (i = 0; i < 3; i++) { // use an existing variable
alert(i); // 3, visible, because declared outside of the loop alert(i); // 3, visible, because declared outside of the loop
``` ```
```` ````
### Skipping parts ### Skipping parts
Any part of `for` can be skipped. Any part of `for` can be skipped.
@ -286,7 +284,6 @@ if (i > 5) {
...and rewrite it using a question mark: ...and rewrite it using a question mark:
```js no-beautify ```js no-beautify
(i > 5) ? alert(i) : *!*continue*/!*; // continue isn't allowed here (i > 5) ? alert(i) : *!*continue*/!*; // continue isn't allowed here
``` ```
@ -321,6 +318,7 @@ We need a way to stop the process if the user cancels the input.
The ordinary `break` after `input` would only break the inner loop. That's not sufficient -- labels, come to the rescue! The ordinary `break` after `input` would only break the inner loop. That's not sufficient -- labels, come to the rescue!
A *label* is an identifier with a colon before a loop: A *label* is an identifier with a colon before a loop:
```js ```js
labelName: for (...) { labelName: for (...) {
... ...
@ -362,6 +360,7 @@ The `continue` directive can also be used with a label. In this case, code execu
Labels do not allow us to jump into an arbitrary place in the code. Labels do not allow us to jump into an arbitrary place in the code.
For example, it is impossible to do this: For example, it is impossible to do this:
```js ```js
break label; // jump to the label below (doesn't work) break label; // jump to the label below (doesn't work)