JavaScript Reference
Tags: ,
Categories: , ,

Quick Reference

The Math.sign() method returns whether a number is negative, positive or zero.

  • Returns 1 if the parameter is positive
  • Returns -1 if the parameter is negative
  • Returns 0 if the parameter is positive zero
  • Returns -0 if the parameter is negative zero
  • Returns Nan if the parameter is not a number
<!-- html element to place output -->
<p id="my_output"></p>
// variable
let my_math = Math.sign(-5);

// output to the HTML element
document.getElementById('my_output').innerHTML = my_math;

Output

-1

Syntax

Math.sign(x)

JavaScript Notes:

  • When using JavaScript, single or double quotation marks are acceptable and work identically to one another; choose whichever you prefer, and stay consistent
  • JavaScript is a case-sensitive language; firstName is NOT the same as firstname
  • Arrays count starting from zero NOT one; so item 1 is position [0], item 2 is position [1], and item 3 is position [2] … and so on
  • JavaScript variables must begin with a letter, $, or _
  • JavaScript variables are case sensitive (x is not the same as X)
If you like our content, and find it helpful, please consider making a small donation. Thank you!

We’d like to acknowledge that we learned a great deal of our coding from W3Schools and TutorialsPoint, borrowing heavily from their teaching process and excellent code examples. We highly recommend both sites to deepen your experience, and further your coding journey. We’re just hitting the basics here at 1SMARTchicken.