Sometimes, we want to check if a number is negative with JavaScript.
In this article, we’ll look at how to check if a number is negative with JavaScript.
How to check if a number is negative with JavaScript?
To check if a number is negative with JavaScript, we use the Math.sign method.
For instance, we write
const number = 1;
if (Math.sign(number) === 1) {
console.log("I'm positive");
} else if (Math.sign(number) === -1) {
console.log("I'm negative");
} else {
console.log("I'm not a number");
}
to call Math.sign with number.
Since 1 positive, Math.sign returns 1.
If a number is negative, it returns -1.
If the number is positive zero, returns 0.
If the number is negative zero, returns -0.
Otherwise, NaN is returned.
Conclusion
To check if a number is negative with JavaScript, we use the Math.sign method.
