Count Truthy Falsy Values Using Javascript

Published on : August 03,2022
Count Truthy Falsy Values Using Javascript

Hi dev,

In this article we will learn example about Count Truthy Falsy Values using javascript. Let's start …

 

Syntax & Example: count-truthy-falsy-values.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>count-truthy-falsy-values.html</title>
  <link rel="stylesheet" type="text/css" href="../style.css" />
</head>
<body> 
  
  <h1>7-count-truthy-falsy-values!</h1>

  <h3>Write a function which checks and count the truthy values from an array</h3>

  Falsy values in JavaScript are:
  <ul>
    <li>false</li>
    <li>0 (zero)</li>
    <li>undefined</li>
    <li>null</li>
    <li>''</li>
    <li>NaN</li>
  </ul>

  <script type="text/javascript" src="script.js"></script>

</body>
</html>

 

Syntax & Example: script.js

console.log('7-count-truthy-falsy-values');

/*
<h3>Write a function which checks and count the truthy values from an array</h3>

Falsy values in JavaScript are:
<ul>
  <li>false</li>
  <li>0 (zero)</li>
  <li>undefined</li>
  <li>null</li>
  <li>''</li>
  <li>NaN</li>
</ul>
*/

const valuesArray = [0, 1, '', undefined, false, true];

function checkCountTruthyFalsy(curArray) {
  let truthyCount = 0;
  
  for (let value of curArray) {
    // no need to check if(value !== false || value !== 0 || value !== '' or ...)
    if (value) {
      truthyCount++;
    }
  }
  return truthyCount;
}

console.log(checkCountTruthyFalsy(valuesArray));

 

Hope it can help you…

Categories : JavaScript

Tags : HTML

Praful Sangani
Praful Sangani
I'm a passionate full-stack developer with expertise in PHP, Laravel, Angular, React Js, Vue, Node, Javascript, JQuery, Codeigniter, and Bootstrap. I enjoy sharing my knowledge by writing tutorials and providing tips to others in the industry. I prioritize consistency and hard work, and I always aim to improve my skills to keep up with the latest advancements. As the owner of Open Code Solution, I'm committed to providing high-quality services to help clients achieve their business goals.
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