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Ilya Kantor 2016-05-26 12:43:49 +03:00
parent 7f1283bdbc
commit 6522852dc7
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26
1-js/2-first-steps/15-while-for/1-loop-last-value/solution.md
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The answer: `1`.
```js run
let i = 3;
while (i) {
alert( i-- );
}
```
Every loop iteration decreases `i` by `1`. The check `while(i)` stops the loop when `i = 0`.
Hence, the steps of the loop make the following sequence ("loop unrolled"):
```js
let i = 3;
alert(i--); // shows 3, decreases i to 2
alert(i--) // shows 2, decreases i to 1
alert(i--) // shows 1, decreases i to 0
// done, while(i) check stops the loop
```

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1-js/2-first-steps/15-while-for/1-loop-last-value/task.md
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importance: 3
---
# Last loop value
What is be the last value alerted by this code? Why?
```js
let i = 3;
while (i) {
alert( i-- );
}
```