Square numbers in javascript

JavaScript — how to square a number in three easy ways

A square number is a number that you get as a result of multiplying a number by itself. For example, 4 is a square number of 2 because 4 = 2*2 .

• Using the Math.pow() method
• Using the exponentiation operator ( ** )
• Using a custom helper function square()

Let’s begin with using the Math.pow() method.

Square a number using Math.pow() method

The Math.pow() method is used to find the exponent value of a number. The exponent value of a number is simply the number itself multiplied as many as X times by an exponent number.

For example, The result of 2 exponent of 4 is 2*2*2*2 = 16

By using the Math.pow() method, you can easily find the square of a number by passing the number 2 as your exponent parameter.

Here’s an example of finding the square of the number 6 , which is 36 :

And that’s how you find the square of a number using Math.pow() method. Let’s see how you can use the exponentiation operator next.

Square a number using the exponentiation operator

JavaScript provides you with the exponentiation operator marked by two asterisk symbols ( ** ) like this:

By using the exponentiation operator, you can easily square any number you want.

Square a number by creating your own helper function

Finally, you can also find the square a number by writing a small helper function as follows:

By writing a function like square() above, you can call the function anytime you need to find the square of a number:

This way, you can reduce repetition in your code and make it cleaner.

Bonus: Finding the square root of a number using JavaScript

Sometimes, you may need to find the square root of a number instead of the square. A square root number is a number that will produce the square number when it’s multiplied by itself:

You can find the square root of a number easily by using the JavaScript Math.sqrt() method which accepts the square number as its argument and return the square root number.

Suppose you have the square number of 9 , you can use the Math.sqrt() method to find the square root number, which is 3 . Take a look at the code below:

Now you’ve learned both how to square a number and how to find the square root of a number using JavaScript. Congratulations! 😉

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How to Square a Number in JavaScript

In this post, we’ll go over the three best ways to square a number in JavaScript.

A square number is a number that results from taking a number and multiplying it by itself.

For various reasons, you’ll want to know how to square a number in JavaScript.

Math.pow()

The best way to square a number is to use the Math.pow() function.

This function is used to take a number and raise it to a power. When it comes to squaring a number, the power is always equal to 2.

Here’s an example of squaring the number 5 :

In general, you can use the Math.pow() function to square any number by setting the exponent to 2.

Exponentiation Operator

Another easy way to square a number is to use the exponentiation operator. The exponentiation operator is the ** symbol.

Here’s how to use the exponentiation operator to square the number 5 :

This operator takes two numbers and returns the first number raised to the power of the second number.

Helper function

Finally, the last way to square a number is to create a helper function that squares a number that you pass in.

Here’s a function that squares a number:

Now you can use this helper function:

Conclusion

In this post, we explored the three best ways to square a number in JavaScript, using the Math.pow() , ** , and a custom helper square() function.

Hopefully, you found this post helpful and informative.

Thanks for reading and happy coding!

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How to square a number in javascript

The most basic way to square a number in JavaScript is to multiply the number my itself. But there’s two more.

Squaring a number is basic Mathematics. You should be able to solve it easily. Anyways if you are just lurking around or finding some tricky way to do that. Here are 3 different ways on how to square a number in JavaScript.

1. Multiply the number by itself

The most basic way to square a number in both in mathematics and JavaScript is to multiply the number my itself.

It’s similar to how you write it in Mathematics. In mathematics you write it as

In JavaScript, there is a slight difference, that is, the multiplication operator is * instead of x.

You just have to replace the x with * to do multiplication in JavaScript. Pretty simple!

The above code will print return 25.

Let us define a function to do that

I assume you are familiar with exponents and power. In mathematics we write something like this

Unfortunately my keyboard doesn’t know how to write that small 2 at the top. I had to copy the number from google just to show you. That’s troublesome! So we prefer to do it the easy way in JavaScript

In JavaScript, we write it as

Use case is the same as above

Note: Though * means multiplication ** doesn't mean double multiplication. It's a convention for power in JavaScript.

3. Using the inbuilt math object

In JavaScript we have a inbuilt Math library which is very useful for various mathematical operations such as rounding of value, finding the value of PI, Square root etc

It also includes a power function. Since the function is inbuilt in Math object you don’t have to define a function. Use case is as follows

That’s it. You have learnt all the 3 ways to square a number in JavaScript.

To know more about JavaScript Math library visit here.

Let me know in the comments if you have some other way of squaring a number in JavaScript.

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Источник

Function square #

Compute the square of a value, x * x . To avoid confusion with multiplying a square matrix by itself, this function does not apply to matrices. If you wish to square every element of a matrix, see the examples.

Syntax #

Parameters #

Returns #

Throws #

Examples #

math.square(2) // returns number 4 math.square(3) // returns number 9 math.pow(3, 2) // returns number 9 math.multiply(3, 3) // returns number 9 math.map([1, 2, 3, 4], math.square) // returns Array [1, 4, 9, 16] 

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How to square a number in JavaScript?

In this tutorial, you will have to learn how to square a number in JavaScript. We will use simple language and approach to make it simple to understand for someone who is just starting to learn code programming.

In addition, we will present an examples and use instinct and comparison to help you understand the topic better.

Method for Squaring in JavaScript

To square a number in JavaScript, we have several choices at our removal. Let’s discuss some of the most common and effective methods:

1. Using the Exponentiation Operator (**)

The easiest way to square a number in JavaScript is by using the exponentiation operator (**).

This operator raises the base number to the power of the exponent, completely squaring the value.

const variable = 15; const squaredNumberResult = variable ** 2; console.log(squaredNumberResult); 

2. Using the Math.pow() Function

The Math.pow() function enables you to performed the power of a given number.

By passing the number and the exponent (in this case, 2), you can simply square a number.

const variable = 30; const squaredNumberResult = Math.pow(variable, 2); console.log(squaredNumberResult); 

3. Multiplying the Number by Itself

Another simple method to square a number in JavaScript is by multiplying the number by itself.

This method is direct and easy to implement.

const variable = 25; const squaredNumberResult = variable * variable; console.log(squaredNumberResult); 

4. Using the Math.sqrt() Function

The Math.sqrt() function is usually used to find the square root of a number. However, you can use this function to square a number by raising it to the power of 0.5.

Let’s have a look at the example code:

const variable = 1000; const squaredNumberResult = Math.sqrt(variable); console.log(squaredNumberResult); 

5. Implementing Bitwise Left Shift Operator

For non-negative integer values, an eccentric method to square a number requires using the bitwise left shift operator (<<).

This method may not be suitable for all situations but it is interesting to explore.

const variable = 28; const squaredNumberResult = variable  

function customSquareExample(num) < return num * num; >const num = 18; const squaredNumberResult = customSquareExample(num); console.log(squaredNumberResult); 

const negativeValue = -25; const squaredNegativeNumberResult = Math.pow(negativeValue, 2); console.log(squaredNegativeNumberResult);

const decimalValue = 10.8; const squaredDecimalNumberResullt = decimalValue * decimalValue; console.log(squaredDecimalNumberResullt); 

116.64000000000001