NaN in javascript part-1 #javascript#webdevelopment #js #frontend #programming #viralshorts

追加: 2026-05-25

[00:00:00]NaN in JavaScript stands for not a number. The type of NaN is number. Let's see the weird part of this NaN. We are comparing NaN with NaN. Even though both are NaN, JavaScript says that they're not equal. NaN is unique because it is the only value in JavaScript that is not equal to itself. Comparing NaN with NaN will always return false. Here, these are the several situations where JavaScript gives NaN as a result. Let us see one of the example. Here, number tries to convert value into a number.

[00:00:28]But here, hello is How hello can become a valid number? So, JavaScript says that it is not a number.

[00:00:35]The result will be NaN. To check for NaN, we have two important methods. We will see in the next video.