Typically, you will use a comparison operator to check a condition, and a logical operator to combine conditions into more complex logic.

There are four logical operators in JavaScript: || (OR), && (AND), ! (NOT), ?? (Nullish Coalescing). Here we cover the first three, the ??

The shift operators are listed in the following table. Logical operators are typically used with Boolean (logical) values; when they are, they return a Boolean value. However, the &&, ||, and ?? operators actually return the value of one of the specified operands, so if these operators are used with non-Boolean values, they may return a non-Boolean value.

Difference between JavaScript comparison and logical operators. In JavaScript, we use comparison operators to compare two values and find the resulting boolean value (true or false).

You will learn more about the use of conditional statements in the if...else chapter of this tutorial. All the comparison operators above can also be used on strings: let text1 = "A"; let text2 = "B"; let result = text1 < text2; Try it Yourself » ... Comparing data of different types may give unexpected results. When comparing a string with a number, JavaScript will convert the string to a number when doing the comparison.

September 1, 2008 - The logical operators in JavaScript are generally used with Boolean operands and return a boolean value. There are mainly three types on logical operators in JavaScript - && (AND), || (OR), and !

More generally, the operator returns the value of the first falsy operand encountered when evaluating from left to right, or the value of the last operand if they are all truthy. const a = 3; const b = -2; console.log(a > 0 && b > 0); // Expected output: false ... Logical AND (&&) evaluates operands from left to right, returning immediately with the value of the first falsy operand it encounters; if all values are truthy, the value of the last operand is returned.

The logical OR (||) (logical disjunction) operator for a set of operands is true if and only if one or more of its operands is true. It is typically used with boolean (logical) values. When it is, it returns a Boolean value. However, the || operator actually returns the value of one of the ...

JavaScript supports logical operators that allow developers to compare values and make decisions based on the result of those comparisons. In this lesson, we will explore the three logical operators in JavaScript: AND (&&), OR (||), and NOT (!), and ...

November 15, 2018 - !(Not), $$ (AND), || (OR). Tagged with javascript, webdev, coding, beginners.

August 25, 2021 - In this tutorial, we’ll go over logical operators. These are commonly used with conditional statements, and the if, else, and else if keywords, as well as the ternary operator. If you are interested in learning more about conditional statements first, refer to How To Write Conditional Statements in JavaScript.

Learn how logical operators work in JavaScript and how they can be used to create complex conditions in your programs.

November 29, 2023 - The primary logical operators are && (AND), || (OR), and ! (NOT). Let's look at each one now. The AND (&&) operator in JavaScript is a logical operator that combines two or more conditions.

January 4, 2025 - Logical operators are special symbols that help make decisions in code. The three main ones are AND (&&), OR (||), and NOT (!).

November 13, 2024 - Summary: in this tutorial, you will learn how to use the JavaScript logical operators including the logical NOT operator( !), the logical AND operator ( &&) and the logical OR operator ( ||).

Comparison operators allow us to assert the equality of a statement with JavaScript. For example, we can assert whether two values or expressions are equal with ===, or, whether one value is greater than another with >. There are scenarios, however, in which we must assert whether multiple values or expressions are true. In JavaScript, we can use logical operators to make these assertions.

In line 1, 7 > 5 && 5 > 3 evaluates to true because both 7 > 5 and 5 > 3 are true individually. The expression 7 > 5 && 2 > 3 evaluates to false because one of the two expressions, 2 > 3, is false. Like line 2, line 3 returns false because both sub-expressions are false. Notice that we can mix and match data types however we like, as long as both sides of the && expression are themselves boolean expressions. JavaScript's logical OR operator, ||, also creates compound boolean expressions.

Learn about the three logical operators in JavaScript and how they can be used to make decisions based on boolean values and expressions.

There are three logical operators in JavaScript. 1. && (AND) 2. || (OR) 3. ! (NOT) && (AND) * accepts multiple arguments * left to right evaluation * If all the arguments are true then return...