typeof - JavaScript | MDN - MDN Web Docs
WEBSep 12, 2023 · typeof - JavaScript | MDN. The typeof operator returns a string indicating the type of the operand's value. Try it. Syntax. js. typeof operand. Parameters. operand. An expression representing the object or primitive whose type is to be returned. Description. The following table summarizes the possible return values of typeof.
JavaScript typeof - W3Schools
WEBThe typeof operator returns the data type of a JavaScript variable. Primitive Data Types. In JavaScript, a primitive value is a single value with no properties or methods. JavaScript has 7 primitive data types: string. number. boolean. bigint. symbol. null. undefined. The typeof operator returns the type of a variable or an expression. Examples.
JavaScript TypeOf – How to Check the Type of a Variable or …
WEBNov 9, 2020 · The typeof operator takes only one operand (a unary operator). It evaluates the type of the operand and returns the result as a string. Here is how you use it when you're evaluating the type of a number, 007. typeof 007; // returns 'number'.
JavaScript typeof
WEBThe typeof operator accepts an operand and returns a string representing the type of the operand. The following shows the syntax of the typeof operator: typeof (operand) Code language: JavaScript (javascript) In this syntax, the …
JavaScript Data Types: Typeof Explained - freeCodeCamp.org
WEBDec 23, 2019 · typeof is a JavaScript keyword that will return the type of a variable when you call it. You can use this to validate function parameters or check if variables are defined. There are other uses as well. The typeof operator is useful because it is an easy way to check the type of a variable in your code.
JavaScript typeof Operator - GeeksforGeeks
WEB5 days ago · Last Updated : 31 May, 2024. The JavaScript typeof operator returns the data type of a variable or expression. It’s a unary operator placed before its operand and returns a string indicating the data type, such as “number”, “string”, “boolean”, “object”, “undefined”, “function”, or “symbol”.
What is the usage of typeof in javascript? - Stack Overflow
WEBNov 12, 2015 · The typeof operator returns a string which represents the type of the operand. We can use this to check the type of a value in the following manner: let nr = 5; if (typeof nr === 'number') {. console.log('nr is number'); }
JavaScript Type Checking – How to Check Type in JS with typeof()
WEBDec 9, 2022 · There are two ways you can use the typeof operator. You can evaluate a single value or an expression: typeof(expression); // Or typeof value; The typeof operator will return the type as a string, meaning “number”, “string”, "boolean”, and lots more.
JavaScript typeof Operator - Programiz
WEBJavaScript typeof Operator. The typeof operator returns the type of variables and values. For example, const a = 9; console.log(typeof a); // number. console.log(typeof '9'); // string. console.log(typeof false); // boolean. Syntax of typeof Operator. The syntax of typeof operator is: typeof operand. Here, operand is a variable name or a value.
typeof - MDN Web Docs
WEBWeb technology for developers. Java Script reference. Expressions and operators. typeof. Jump to: Syntax. Description. Examples. Additional information. Specifications. Browser compatibility. IE-specific notes. See also. The typeof operator returns a string indicating the type of the unevaluated operand. JavaScript Demo: Expressions - typeof. x. 1.
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