Frequent question: What is not a keyword in JavaScript?

Which is not a keyword?

Note: true , false , and null are not keywords, but they are literals and reserved words that cannot be used as identifiers.

What are keywords in JS?

Keywords are tokens that have special meaning in JavaScript: break , case , catch , continue , debugger , default , delete , do , else , finally , for , function , if , in , instanceof , new , return , switch , this , throw , try , typeof , var , void , while , and with .

What does not not do in JavaScript?

The JavaScript Not Operator (!)

operator reverses the logical (true or false) state of the value. In this case it is the truthy or falsey value. This may seem odd, but it can be useful. Basically you can use this to execute some code if the variable evaluates to a false state.

Is array a keyword in JavaScript?

Object , Array , Function and Number are not keywords, nor are they exactly “special” (whatever you think they mean) words. They’re nothing more than built-in function/class types in JavaScript (you can do a typeof on them and see).

Is Python a keyword?

The is keyword is used to test if two variables refer to the same object. … The test returns False if they are not the same object, even if the two objects are 100% equal. Use the == operator to test if two variables are equal.

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Is Instanceof a keyword in Java?

instanceof is a keyword that is used for checking if a reference variable is containing a given type of object reference or not. Following is a Java program to show different behaviors of instanceof.

What is === in JavaScript?

=== (Triple equals) is a strict equality comparison operator in JavaScript, which returns false for the values which are not of a similar type. This operator performs type casting for equality. If we compare 2 with “2” using ===, then it will return a false value.

Is try a keyword in JavaScript?

JavaScript try and catch

The try statement allows you to define a block of code to be tested for errors while it is being executed. The catch statement allows you to define a block of code to be executed, if an error occurs in the try block.

Is function a keyword in JavaScript?

The function keyword can be used to define a function inside an expression. You can also define functions using the Function constructor and a function declaration.

What is not in Java?

The not operator is a logical operator, represented in Java by the ! … It’s a unary operator that takes a boolean value as its operand. The not operator works by inverting (or negating) the value of its operand.

Which is not JavaScript framework?

2. Which of the following is not a framework? Explanation: One of the most popular frameworks is jQuery which is used in web development. Here, JavaScript is a scripting language and not a framework.

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