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 would be 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 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.

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 math function JavaScript?

The JavaScript Math is a built-in object that provides properties and methods for mathematical constants and functions to execute mathematical operations. It is not a function object, not a constructor. You can call the Math as an object without creating it because the properties and methods of Math are static.

How do you do addition in JavaScript?

Basic JavaScript Addition Add numbers in JavaScript by placing a plus sign between them. You can also use the following syntax to perform addition: var x+=y; The “+=” operator tells JavaScript to add the variable on the right side of the operator to the variable on the left.

What is the use of isNaN function?

The isNaN() function is used to check whether a given value is an illegal number or not. It returns true if value is a NaN else returns false. It is different from the Number.

What is reduce function in JavaScript?

The reduce() method executes a user-supplied “reducer” callback function on each element of the array, in order, passing in the return value from the calculation on the preceding element. The final result of running the reducer across all elements of the array is a single value.