 # JavaScript: Check two given integer values and return true if one of the number is 15 or if their sum or difference is 15

## JavaScript Basic: Exercise-45 with Solution

Write a JavaScript program to check two given integer values and return true if one of the number is 15 or if their sum or difference is 15.

Pictorial Presentation: Sample Solution:

HTML Code:

``````<!DOCTYPE html>
<html>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JavaScript program to check two given integer values and return true if one of the number is 15 or if their sum or difference is 15.</title>
<body>

</body>
</html>
```
```

JavaScript Code:

``````function test_number(x, y) {
return (x === 15 || y === 15 || x + y === 15 || Math.abs(x - y) === 15);
}

console.log(test_number(15, 9));
console.log(test_number(25, 15));
console.log(test_number(7, 8));
console.log(test_number(25, 10));
console.log(test_number(5, 9));
console.log(test_number(7, 9));
console.log(test_number(9, 25));
```
```

Sample Output:

```true
true
true
true
false
false
false
```

Flowchart: ES6 Version:

``````function test_number(x, y) {
return (x === 15 || y === 15 || x + y === 15 || Math.abs(x - y) === 15);
}

console.log(test_number(15, 9));
console.log(test_number(25, 15));
console.log(test_number(7, 8));
console.log(test_number(25, 10));
console.log(test_number(5, 9));
console.log(test_number(7, 9));
console.log(test_number(9, 25));
``````

Live Demo:

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## JavaScript: Tips of the Day

Parameter's value

```function getItems(fruitList, ...args, favoriteFruit) {
return [...fruitList, ...args, favoriteFruit]
}

getItems(["banana", "apple"], "pear", "orange")
```

...args is a rest parameter. The rest parameter's value is an array containing all remaining arguments, and can only be the last parameter! In this example, the rest parameter was the second parameter. This is not possible, and will throw a syntax error.

```function getItems(fruitList, favoriteFruit, ...args) {
return [...fruitList, ...args, favoriteFruit];
}

getItems(['banana', 'apple'], 'pear', 'orange');```
The above example works. This returns the array [ 'banana', 'apple', 'orange', 'pear' ].

Ref: https://bit.ly/3jFRBje