In JavaScript “0” is equal to false because “0” is of type string but when it tested for equality the automatic type conversion of JavaScript comes into effect and converts the “0” to its numeric value which is 0 and as we know 0 represents false value. So, “0” equals to false.
Example: This example illustrates why “0” equals to false.
<script> // JavaScript code to demonstrate // why “0” is equal to false function GFG() { // Print type of "0" document.write(typeof "0" + "</br>"); // Test whether "0" equals to false // or not. If "0" is equal to false // then "0" == false i.e. // false == false which return true var result = ("0" == false); // Print result document.write(result + "</br>"); // Convert and print "0" to its numeric // value document.write(Number("0") + "</br>"); // Convert and print false in numeric value document.write(Number(false) + "</br>"); // So both numeric value are same // Therefore condition "0" == false // evaluates to true document.write("0" == false); document.write("</br>"); // Or this statement document.write(Number("0") == Number(false)); } // Driver code GFG(); </script> |
Output:
string true 0 0 true true
So, from above it is clear that “0” is equal to false and reason behind this behavior is also clear, but when “0” is tested in if condition then it evaluates to true.
Whether you’re preparing for your first job interview or aiming to upskill in this ever-evolving tech landscape, neveropen Courses are your key to success. We provide top-quality content at affordable prices, all geared towards accelerating your growth in a time-bound manner. Join the millions we’ve already empowered, and we’re here to do the same for you. Don’t miss out – check it out now!
