Why do Empty JavaScript Arrays Evaluate to True in Conditional Structures? Last Updated : 12 Aug, 2024 Comments Improve Suggest changes Like Article Like Report In JavaScript, there are situations when we need to evaluate whether a variable is "truthy" or "falsy" within conditional structures like if statements. While some values, like 0, null, undefined, and "" (empty string), are considered falsy and that should be the case, but empty arrays do not follow such instead they evaluate to true.The following values are always falsy:false0 (zero)0n (BigInt zero)"" (empty string)nullundefinedNaN (a special Number value meaning Not-a-Number!)All other values are truthy, including "0" (zero in quotes), "false" (false in quotes), empty functions, empty arrays ([]), and empty objects ({}).As we know in JavaScript, all objects (including arrays, functions, and regular expressions) are inherently true. An empty array is still an object in JavaScript, and since objects are always evaluated as true, an empty array will always return true in a conditional structure. This behavior stems from the way JavaScript handles data types. In JavaScript, arrays are a type of object. As such, when JavaScript evaluates an array in a Boolean context (such as inside a if statement), it checks if the value is an object rather than if it's empty or populated. Since the empty array is indeed an object, it evaluates to true.Example: The example shows if statement evaluates the empty array and we know the empty array is considered an object, so it is considered truthy, and the code within the if the block is executed. JavaScript let emptyArray = []; if (emptyArray) { console.log("The empty array is truthy!"); } else { console.log("The empty array is falsy!"); } OutputThe empty array is truthy! ConclusionEmpty arrays in JavaScript are evaluated to be true in conditional structures because arrays are objects, and all objects are considered truthy in JavaScript. This can sometimes lead to confusion, especially when we expect an empty array to be false. Understanding this behavior helps in writing more predictable and bug-free JavaScript code. Comment More infoAdvertise with us Next Article Why do Empty JavaScript Arrays Evaluate to True in Conditional Structures? A abhaystriver Follow Improve Article Tags : JavaScript Web Technologies Similar Reads How to Define an Array with Conditional Elements in JavaScript? Sometime we may need to define an array with elements that depend on certain conditions. Such situation may occur when we have to dynamically generate arrays based on runtime logic such as including or excluding elements based on specific criteria. In this article, we'll explore various ways to defi 2 min read How to Declare Two Dimensional Empty Array in JavaScript ? 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