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# Strict inequality

With

`!==`

two values are compared for strict inequality.
```
let c1 = 'rose' !== 'Rose';
let c2 = 10 !== '10';
```

Both comparisons result in `true`

.
The first one, because the two strings differ in upper and lower case.
The second, because the two values differ in type.## Exercise

Write a function

Example:

`unequal`

that checks 3 values for strict inequality. The function
should return `true`

if all three parameters are strict unequal. Otherwise `false`

.Example:

`unequal(1, 2, 3)`

should return `true`

and
`unequal(1, 1, 2)`

should return `false`

.
+ Hint

```
function unequal(a, b, c) {
return a !== b && ...
}
```

+ Solution

```
function unequal(a, b, c) {
return a !== b && a !== c && b !== c;
}
```