What is the result of 1 2 3 in JavaScript?

1+ +”2″+3 results 6 1+”2″+3 results “123” AS The unary + operator converts its operand to Number type. +”2″ is a way to cast the string “2” to the number 2 . The remain is a simple addition.

What is the output of 2 5+ 3 in JavaScript?

That’s why the answer is 73.

What is the result of 2 2 in JavaScript?

JavaScript performs string concatenation when find + . So the first “2” and second “2” makes “22”. But when performing subtraction ( – ) on strings, coercion happens. So the resulted “22” coerced to number 22 and final “2” coerced to number 2 .

What is output of the code in JavaScript?

JavaScript Output defines the ways to display the output of a given code. The output can be display by using four different ways which are listed below: innerHTML: It is used to access an element. It defines the HTML content.

What would be the result of 3 2 7 in JavaScript?

What would be the result of 3+2+”7″? Since 3 and 2 are integers, they will be added numerically. And since 7 is a string, its concatenation will be done. So the result would be 57.

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What is triple dot in JavaScript?

(three dots in JavaScript) is called the Spread Syntax or Spread Operator. This allows an iterable such as an array expression or string to be expanded or an object expression to be expanded wherever placed.

What is $() in JavaScript?

The $() function

The dollar function, $(), can be used as shorthand for the getElementById function. To refer to an element in the Document Object Model (DOM) of an HTML page, the usual function identifying an element is: document. … The $() function reduces the code to: $(“id_of_element”).

Whats the difference between += and =+?

+= is a compound assignment operator – it adds the RHS operand to the existing value of the LHS operand. =+ is just the assignment operator followed by the unary + operator.

What does 1 mean in JavaScript?

3. 23. No, -1, 0, and 1 in a comparison function are used to tell the caller how the first value should be sorted in relation to the second one. -1 means the first goes before the second, 1 means it goes after, and 0 means they’re equivalent.

What does i ++ mean in JavaScript?

The increment operator adds 1 to the operand and the decrement operator subtracts 1 from the operand.

How display JavaScript results in HTML?

JavaScript can “display” data in different ways:

  1. Writing into an HTML element, using innerHTML .
  2. Writing into the HTML output using document.write() .
  3. Writing into an alert box, using window.alert() .
  4. Writing into the browser console, using console.log() .

What is the observation made in the following JavaScript code let num =[ 1 3 5 ];?

Discussion Forum

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Que. Consider the code snippet given below: var count = [1,,3]; What is the observation made?
b. This results in an error
c. This results in an exception
d. None of the mentioned
Answer:The omitted value takes “undefined”

What is the original name of JavaScript?

What was JavaScript originally called? The early versions of JavaScript were called Mocha. Not long after a Mocha prototype was introduced into Netscape Communicator (May 1995), it was renamed to LiveScript, purely because the world Live was better for marketing.

What does NaN mean in JavaScript?

NaN is a property of the global object. In other words, it is a variable in global scope. The initial value of NaN is Not-A-Number — the same as the value of Number. … There are five different types of operations that return NaN : Number cannot be parsed (e.g. parseInt(“blabla”) or Number(undefined) )

What is curry in JavaScript?

Currying is when you break down a function that takes multiple arguments into a series of functions that each take only one argument. Here’s an example in JavaScript: function add (a, b) { return a + b; } add(3, 4); // returns 7. This is a function that takes two arguments, a and b, and returns their sum.