 # JavaScript: Add two digits of a given positive integer of length two

## JavaScript Basic: Exercise-81 with Solution

Write a JavaScript program to add two digits of a given positive integer of length two.

Pictorial Presentation: Sample Solution:

HTML Code:

``````<!DOCTYPE html>
<html>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JavaScript program to add two digits of a given positive integer of length two.</title>
<body>

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

JavaScript Code:

``````function add_two_digits(n)
{
return n % 10 + Math.floor(n / 10);
}
```
```

Sample Output:

```7
5
```

Flowchart: ES6 Version:

``````function add_two_digits(n)
{
return n % 10 + Math.floor(n / 10);
}
``````

Live Demo:

See the Pen javascript-basic-exercise-81 by w3resource (@w3resource) on CodePen.

What is the difficulty level of this exercise?

﻿

## 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