## What needs to be done to get the correct sequence of numbers from 0 to 4 inclusive?

```javascript
for(var i = 0; i < 5; i++) {
    setTimeout(function() {
        console.log(i);
    }, 0)
}
```
---

## Solutions:

1. Third parameter __i__ in setTimeout as argument for handler
```javascript
for(var i = 0; i < 5; i++) {
    setTimeout(function(i) {
        console.log(i)
   }, i*1000, i)
}
```

2. IIFE in setTimeout
```javascript
for(var i = 0; i < 5; i++) {
    setTimeout((function(z) {
        return function() {
            console.log(z)
        }
    })(i), i * 1000)
}
```

3. IIFE out of setTimeout
```javascript
for(var i = 0; i < 5; i++) {
    (function(z) {
        setTimeout(function(i) {
            console.log(z)
        }, i*1000)
     })(i)
}
```

4. With help of bind
```javascript
for(var i = 0; i < 5; i++) {
    setTimeout((function(i) {
        console.log(i)
    }).bind(null, i), i*1000)
}
```


5. ES2015 approach (block scoped variable with <code>let</code> keyword )
```javascript
for(let i = 0; i < 5; i++) {
    setTimeout(function() {
        console.log(i)
    }, i*1000)
}
```