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[Guide] Basic JS: Inequality operator. Enhancements (#28501)

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* Basic JS: Inequality operator. Enhancements

From [this PR on the old guide repo](https://github.com/freeCodeCamp/guide/pull/8651)
·Added exercise explanation, run code link, code explanation and resources.

* fixed: fixed typo
This commit is contained in:
Adrian Skar
2019-03-08 23:42:20 +01:00
committed by Randell Dawson
parent 64d7eba61b
commit f0270b8439
1 changed files with 29 additions and 6 deletions
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35
guide/english/certifications/javascript-algorithms-and-data-structures/basic-javascript/comparison-with-the-inequality-operator/index.md
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@ -3,15 +3,38 @@ title: Comparison with the Inequality Operator
---
## Comparison with the Inequality Operator
* `!=` (Inequality) is a logical operator that returns true case the value on the left is different from the one on the right.
* The inequality operator considers `7` and `"7"` to be the same because it doesn't compare the type of the variable.
## Basic Solution
### Problem explanation:
· _Add the inequality operator `!=` in the `if` statement so that the function will return "Not equal" when `val` is not equivalent to `99`._
#### Hint 1
The inequality operator (`!=`) will return `true` if the first value is not equal to the second one without taking value type into consideration.
> _try to solve the problem now_
>
## Spoiler alert!
**Solution ahead!**
## Basic code solution:
```javascript
// Setup
function testNotEqual(val) {
if (val != 99)
if (val != 99) { // Change this line
return "Not Equal";
}
return "Equal";
}
```
// Change this value to test
testNotEqual(10);
```
· Run code at [repl.it](https://repl.it/@AdrianSkar/Basic-JS-Comparison-with-the-inequality-operator).
### Code explanation
The function first evaluates `if` the condition `(val != 99)` evaluates to `true`. If it does, it returns the statement between the curly braces ("Not equal"). If it doesn't, it returns the next `return` statement outside them ("Equal").
### Resources
- ["Inequality operator" - *MDN JavaScript reference*](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Comparison_Operators#Using_the_Equality_Operators#Inequality_(!))