# 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 that checks two integer values and returns true if either one 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

Assigns default values for all properties in an object that are undefined

Example:

```const tips_defaults = (obj, ...defs) => Object.assign({}, obj, ...defs.reverse(), obj);
console.log(tips_defaults({ p: 1 }, { q: 2 }, { q: 6 }, { p: 3 }));
```

Output:

```[object Object] {
p: 1,
q: 2
}
```

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