You can use the Boolean() function to find out if an expression (or a variable) is true: Or even easier: The chapter JS Comparisons gives a full overview of comparison operators. The …

Mar 26, 2013 · It is possible to do. You can also pass the non boolean variable into the new Boolean() and it will make IsLoggedIn boolean. Don't use new Boolean (); IsLoggedIn will evaluate to true in all of those situations (yes, new Boolean …

Mar 6, 2025 · Boolean values can be one of two values: true or false, representing the truth value of a logical proposition. Boolean values are typically produced by relational operators, equality operators, and logical NOT (!). They can also be produced by functions that represent conditions, such as Array.isArray().

Dec 31, 2014 · The short answer: using the new Boolean () constructor creates a wrapper around your value so that calling the variable always returns true. If all you want to do is store true/false, without any extra functions or logic on the variable holding the value, then you should probably just assign it directly. ie, var deletemode = false

Dec 11, 2024 · To represent logical values, JavaScript uses the Boolean data type, which has two possible values: true or false. These values often result from comparisons or logical operations. Additionally, the Boolean () function can convert other types of values into Boolean, determining their truthy or falsy nature. The Boolean () Function

Feb 2, 2024 · We can store binary values in a variable. For that, we need a Boolean-type variable. But in JavaScript, the two syntaxes for declaring a variable are using let and var keywords. The following are the syntaxes for declaring a variable in JavaScript using each keyword.

Learn how to declare a boolean in JavaScript with this comprehensive guide. Understand the syntax and usage of boolean values.

There are two ways to do this: using the == operator and using the === operator. Here are two examples: You are probably wondering what the difference is between the == and === equality operators. The === operator checks for equality between both value and type. The == operator only checks for the equality of value.

Nov 3, 2024 · Booleans enable you to express logical propositions programmatically. They allow code to mimic human decision-making more closely through conditional logic flows. Here is an example boolean variable: While boolean primitives can only be true or false, the Boolean object wrapper also contains those values:

Mar 17, 2025 · In JavaScript, you can declare a boolean variable using the var, let, or const keywords followed by the variable name and either true or false as the initial value.