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Defined side effects.

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hemanth.hm 2015-06-07 18:20:10 +05:30
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@ -73,7 +73,11 @@ greet // yo;
---
## Side effects
> A function or expression is said to have a side effect if apart from returning a value, it modifies some state or has an observable interaction with external functions.
```js
console.log("IO is a side effect!");
```
---
## Idempotency