67 lines
2.2 KiB
Markdown
67 lines
2.2 KiB
Markdown
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---
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title: Set Default Parameters for Your Functions
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---
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## Set Default Parameters for Your Functions
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:triangular_flag_on_post: Remember to use Read-Search-Ask if you get stuck. Try to pair program :busts_in_silhouette: and write your own code :pencil:
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### :checkered_flag: Problem Explanation:
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```javascript
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const increment = (function() {
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"use strict";
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return function increment(number, value) {
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return number + value;
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};
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})();
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console.log(increment(5, 2)); // returns 7
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console.log(increment(5)); // returns NaN
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```
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We'll be modifying the increment function so that the **number** parameter is incremented by 1 by default, by setting **value** to 1 if a value for **value** is not passed to the increment function.
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### :speech_balloon: Hint: 1
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Let's identify where the parameter **value** is in JS function
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try to solve the problem now
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### :speech_balloon: Hint: 2
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Set **value** equal to something so that it is that value by default
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try to solve the problem now
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### Spoiler Alert!
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Solution ahead!
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## :beginner: Basic Code Solution:
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```javascript
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const increment = (function() {
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"use strict";
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return function increment(number, value = 1) {
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return number + value;
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};
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})();
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console.log(increment(5, 2)); // returns 7
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console.log(increment(5)); // returns NaN
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```
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:rocket: [Run Code](https://repl.it/@RyanPisuena/PleasingFumblingThings)
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## Code Explanation
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* This section is pretty straightforward. Pass this section by setting the **value** parameter equal to 1. When the function comes across test cases where **value** has not been passed anything, then **value** will be assigned one by default.
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Relevant Links:
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[Javascript default parameters](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Default_parameters)
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# :clipboard: NOTES FOR CONTRIBUTIONS:
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* :warning: DO NOT add solutions that are similar to any existing solutions. If you think it is similar but better, then try to merge (or replace) the existing similar solution.
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* Add an explanation of your solution.
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* Categorize the solution in one of the following categories — Basic, Intermediate and Advanced. :traffic_light:
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