---
id: 587d7b88367417b2b2512b46
title: Set Default Parameters for Your Functions
challengeType: 1
---
## Description
In order to help us create more flexible functions, ES6 introduces default parameters for functions.
Check out this code:
function greeting(name = "Anonymous") {
return "Hello " + name;
}
console.log(greeting("John")); // Hello John
console.log(greeting()); // Hello Anonymous
The default parameter kicks in when the argument is not specified (it is undefined). As you can see in the example above, the parameter name will receive its default value "Anonymous" when you do not provide a value for the parameter. You can add default values for as many parameters as you want.
## Instructions
Modify the function increment by adding default parameters so that it will add 1 to number if value is not specified.
## Tests
```yml
tests:
- text: 'The result of increment(5, 2) should be 7.'
testString: 'assert(increment(5, 2) === 7, "The result of increment(5, 2) should be 7.");'
- text: The result of increment(5) should be 6.
testString: 'assert(increment(5) === 6, "The result of increment(5) should be 6.");'
- text: default parameter 1 was used for value.
testString: 'getUserInput => assert(getUserInput("index").match(/value\s*=\s*1/g), "default parameter 1 was used for value.");'
```
## Challenge Seed
```js
const increment = (function() {
"use strict";
return function increment(number, value) {
return number + value;
};
})();
console.log(increment(5, 2)); // returns 7
console.log(increment(5)); // returns 6
```
## Solution
```js
// solution required
```