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what is the value of variable x after the following statement is executed in JavaScript? Var x2-'3'+'4';

what is the value of variable x after the following statement is executed in JavaScript? Var x2-'3'+'4'; Correct Answer Undefined

undefined is a property of the global object. That is, it is a variable in global scope. The initial value of undefined is the primitive value undefined. In modern browsers (JavaScript 1.8.5 / Firefox 4 + ), undefined is a non - configurable, non - writable property, per the ECMAScript 5 specification. (Even when this is not the case, avoid overriding it.) A variable that has not been assigned a value is of type undefined. A method or statement also returns undefined if the variable that is being evaluated does not have an assigned value. A function returns undefined if a value was not returned.

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