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## How do you write even numbers in JavaScript?

Write a JavaScript program to find the number of even digits in a given integer. ES6 Version: **function even_digits(num) { let ctr = 0**; while (num) { ctr += num % 2 === 0; num = Math. floor(num / 10); } return ctr; } console.

## How do you check if a number is even in JavaScript?

**Use the modulus % operator** to determine if a number if odd or even in JavaScript.

## How do you display numbers in JavaScript?

**The rules for displaying numbers are can be summarized as follows:**

- Use exponential notation if there are more than 21 digits before the decimal point. …
- Use exponential notation if number starts with “0.” …
- Otherwise, use fixed notation.

## What is the meaning of in JavaScript?

**The in operator returns true** if the specified property is in the specified object or its prototype chain.

## What does === mean in JavaScript?

The **triple equals operator** ( === ) returns true if both operands are of the same type and contain the same value. If comparing different types for equality, the result is false. This definition of equality is enough for most use cases. When comparing the string “0” and the number 0 the result is false as expected.

## What is a const in JavaScript?

In JavaScript, `const` means **that the identifier can’t be reassigned**. (Not to be confused with immutable values. Unlike true immutable datatypes such as those produced by Immutable. js and Mori, a `const` object can have properties mutated.)

## What is an even number in math?

: **a whole number that is able to be divided by two into two equal whole numbers The** numbers 0, 2, 4, 6, and 8 are even numbers.

## What is an even prime number?

**Two** is the only even number that is a prime. It’s the smallest prime number. All prime numbers, except for 2, are odd numbers.

## What is the example of odd numbers?

Definition of odd number. : a whole number that is not able to be divided by two into two equal whole numbers The **numbers 1, 3, 5, and 7** are odd numbers.

## What is number in JavaScript?

Number is **a primitive wrapper object used to represent and manipulate numbers** like 37 or -9.25 . Values of other types can be converted to numbers using the Number() function. … The JavaScript Number type is a double-precision 64-bit binary format IEEE 754 value, like double in Java or C#.

## Is NaN in JavaScript?

JavaScript Number isNaN()

isNaN() method determines whether a value is NaN (**Not-A-Number**). This method returns true if the value is of the type Number, and equates to NaN. Otherwise it returns false. … isNaN() does not convert the values to a Number, and will not return true for any value that is not of the type Number.

## Is NaN function JavaScript?

JavaScript isNaN() Function

The isNaN() function **determines whether a value is an illegal number** (Not-a-Number). This function returns true if the value equates to NaN. Otherwise it returns false. This function is different from the Number specific Number.