JavaScript SIGN Function

The JavaScript sign function is one of the Math functions which will find the Sign of a given expression. It returns the result as Positive, Negative, or Zero. The basic syntax of the JavaScript sign Function is as follows.

JavaScript sign Syntax

Math.sign(number);

If the number argument is positive or negative zero, the JavaScript sign function will return Zero as output.
If it is a Negative Number, it returns a Negative One as output.
When a number argument is a positive number, it will return Positive One as output.
If it is not a number, the function will return NaN.
If it is Null, it will convert the Null value to Zero.

JavaScript sign Function Example

In this example, we will find the Sign of a given expression with different data types and display the output.

First, We used both Positive and negative Zeros.
Next, We used both the positive and negative values as the JavaScript function arguments.
Next, We tried with a String argument. As we said before, this will return NaN (Not a Number) as output.
Next, We tried the Math function with a Null argument, which returns zero.
In the last statement, We used it with multiple values.

<!DOCTYPE html>
<html>
<head>
    <title> JavaScriptSIGNFunction </title>
</head>
<body>
  <h1> JavaScriptSIGNFunction </h1>
  <p id = "Pos"></p>
  <p id = "Neg"></p>
  <p id = "Dec"></p>
  <p id = "Neg_Dec"></p>
  <p id = "Str"></p>
  <p id = "Exp"></p>
  <p id = "Null"></p>
  <p id = "Multi"></p>
  <script>
    document.getElementById("Pos").innerHTML = Math.sign(0);
    document.getElementById("Neg").innerHTML = Math.sign(-0);
    document.getElementById("Dec").innerHTML = Math.sign(10.45);
    document.getElementById("Neg_Dec").innerHTML = Math.sign(-6.45);
    document.getElementById("Str").innerHTML = Math.sign("JavaScript");
    document.getElementById("Null").innerHTML = Math.sign(null);
    document.getElementById("Multi").innerHTML = Math.sign(2 + 5 - 5);
  </script>
</body>
</html>