Nullish coalescing operator (??) - JavaScript | MDN
Aug 26, 2025 · The nullish coalescing (??) operator is a logical operator that returns its right-hand side operand when its left-hand side operand is null or undefined, and otherwise returns its left-hand side …
JavaScript Logical Operators - W3Schools
JavaScript Logical Operators Logical operators are used to determine the logic between variables or values. Given that x = 6 and y = 3, the table below explains the logical operators:
How the Question Mark (?) Operator Works in JavaScript
Feb 3, 2021 · The conditional or question mark operator, represented by a ?, is one of the most powerful features in JavaScript. The ? operator is used in conditional statements, and when paired with a :, …
What does the !! (double exclamation mark) operator do in ...
Because JavaScript has what are called "truthy" and "falsy" values, there are expressions that when evaluated in other expressions will result in a true or false condition, even though the value or …
Nullish coalescing operator - The Modern JavaScript Tutorial
Due to safety reasons, JavaScript forbids using ?? together with && and || operators, unless the precedence is explicitly specified with parentheses. The code below triggers a syntax error:
JavaScript Logical Operators - GeeksforGeeks
Jan 16, 2026 · Logical operators in JavaScript are used to combine or modify boolean values to make decisions. They help control program flow by evaluating whether one or more conditions are true or …
JavaScript Nullish Coalescing Operator - Online Tutorials Library
The Nullish Coalescing operator in JavaScript is represented by two question marks (??). It takes two operands and returns the first operand if it is not null or undefined.
JavaScript Operators Reference - W3Schools
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An Introduction to JavaScript Logical Operators By Examples
In this tutorial, you will learn how to use JavaScript logical operators including logical NOT (!) AND (&&), and OR (|) operators.
The Modern JavaScript Tutorial
16 hours ago · Here we learn JavaScript, starting from scratch and go on to advanced concepts like OOP. We concentrate on the language itself here, with the minimum of environment-specific notes.