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JavaScript Number.EPSILON Property Method

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The JavaScript Number.EPSILON property represents the difference between 1 and the smallest floating point number greater than 1.

A floating point number, is a positive or negative whole number with a decimal point. For example, 1.2, 2.3, 4.5, ...etc.

Syntax

Following is the syntax of JavaScript Number.EPSILON() property −

Number.EPSILON

Parameters

  • It does not accept any parameter

Return value

This property has no return return value.

Example 1

In the following example, we are using the JavaScript Number.EPSILON property represents the difference between 1 and the smallest floating point number greater than 1.

<html>
<head>
<title>JavaScript Number.EPSILON Property</title>
</head>
<body>
<script>
   var result = Number.EPSILON;
   document.write("Value of the epsilon: ", result);
</script>
</body>
</html>

Output

The above program produces the epsilon value as −

Value of the epsilon: 2.220446049250313e-16

Example 2

The following is another example of the JavaScript Number.EPSILON property. We define a function named equal(x, y), which compares value with Number.EPSILON, and return true or false based on the comparison.

<html>
<head>
<title>JavaScript Number.EPSILON Property</title>
</head>
<body>
<script>
   function equal(x, y) {
      return (x-y) < Number.EPSILON;
   }
   let x = 10.1;
   let y = 10.2;
   document.write("x = ", x, ", y = ", y);
   //callig the function
   document.write("<br>The result of '(x-y) < Number.EPSILON': ", equal(x, y));
   document.write("<br>The result of '(x = x+y, y) < Number.EPSILON': ", equal(x+y, y));
</script>
</body>
</html>

Output

After executing the above program, it will return the following output −

x = 10.1, y = 10.2
The result of '(x-y) < Number.EPSILON': true
The result of '(x = x+y, y) < Number.EPSILON': false
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