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Dhairya Shah
Dhairya Shah

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Determine Odd / Even Numbers using JavaScript

#javascript #webdev #tutorial #programming

In this article, we are going to talk about numbers, odd and even numbers with some JavaScript.

Let's gets started,

  • Choose a random number 
let number = 24
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  • As we know this number is even, but let's check this with JavaScript 
if(number % 2 === 0){
        console.log(`${number} is an even number`)
}else{
        console.log(`${number} is odd number`)
}
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  • This gives the following output, 
// 24 is an even number
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This is how you can determine odd / even numbers using JavaScript.

By the way, I have a tutorial on it so make sure to check that out

Top comments (6)

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jonrandy profile image
Jon Randy 🎖️ • • Edited

If you care about performance, it's actually quicker to use a bitwise test:

const isOdd = i => i&1
const isEven = i => 1&i^1
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thebox193 profile image
Sir.Nathan (Jonathan Stassen) •

I've never really understood bitwise operators.

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thebox193 profile image
Sir.Nathan (Jonathan Stassen) •

Nifty! What other ways might you determine if a number is even or odd?
How might you use this to determine if a number is divisible by 5?

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dhairyashah profile image
Dhairya Shah •

To Determine number is divisible by 5, you can try

let number = 150

if(number % 5 === 0){
        console.log(`${number} is divisible by five`)
}else{
        console.log(`${number} is not divisible by 5`)
}
// Output: 150 is divisible by five
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thebox193 profile image
Sir.Nathan (Jonathan Stassen) •

Nice! Makes sense!

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andrewbaisden profile image
Andrew Baisden •

Works like a charm I use this code often when trying to separate odd from even.

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