The JavaScript method math.floor reduces a specified number to the nearest lower integer and provides that value as the output. In cases where the input number is already an integer, the floor method will return it unchanged.
Syntax
The syntax for the floor method is illustrated as follows:
Math.floor(num)
Parameter
num - A number.
Return
The greatest integer value that is less than or equal to the specified number.
JavaScript Math floor method example
In this section, we will explore the floor method by examining several examples.
Example 1
Let’s examine an example that reduces the specified number to the nearest integer value.
<script>
document.writeln(Math.floor(7.2)+"<br>");
document.writeln(Math.floor(0.2));
</script>
Output:
Example 2
In this instance, we will demonstrate the utilization of the floor method with negative numerical values.
<script>
document.writeln(Math.floor(-7.2)+ "<br>");
document.writeln(Math.floor(-0.2));
</script>
Output:
-8
-1
Example 3
In this section, you have the opportunity to evaluate the floor method using your own custom test scenarios.
<script>
function display()
{
var x=document.getElementById("num").value;
document.getElementById("result").innerHTML=Math.floor(x);
}
</script>
<form>
Enter a number: <input type="text" id="num">
<input type="button" onclick="display()" value="submit">
</form>
<p><span id="result"></span></p>