JavaScript pow() method
Some times programmers may need to evaluate the value by the power of some
numbers therefore JavaScript provides an in-built function Math.pow().
Syntax:
Math.pow(x,y) returns value of x to the power of y (xy).
Where x and y both are required.
In the following example we will describe you the use of Math.pow()
method with very simple code. Here in this example code we have created two
input boxes into which we will take the values of x and y from the user side.
Description of code:
Take two values x and y from the user and then apply the Math
object's method pow() onto it. When user clicks on the button "Show
Value" it calls the method callPow() as defined in the
JavaScript within our <script></script> tag.
function callPow(){
var val= document.getElementById("txt").value;
var power= document.getElementById("txt2").value;
alert(Math.pow(val,power));
}
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Here we have taken the values of x and y into the "val" and "power"
variables. Full html code for this example is as follows :
<html>
<body>
<script>
function callPow(){
var val= document.getElementById("txt").value;
var power= document.getElementById("txt2").value;
alert(Math.pow(val,power));
}
</script>
<div style="background: #cf2255; width:'100%';"
align="center">
<font color="#ffffcc" size="12pt">
<b>Pow Example</b></font>
</div>
<center>
<div style="background: #ffffcc;
width:'100%';" align="center">
Input number :<input type="text" id="txt" value=""/>
to the power<input type="text" id="txt2" value=""/>
<button onclick="callPow();">Show Value</button>
</div>
</center>
</body>
</html>
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Output :
Input numbers into the text boxes :
then click on button "Show Value" to view results.
Calculate 3 to the power 5 (35).
You can also download full HTML code from the following link as given below.
Download Source Code
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