Pass values to a JavaScript Function

Overview

In this post, we will develop a simple JavaScript function and learn how to pass values to a JavaScript function. The script is simple add function. However, we will pass the number of digits that needs to appear after decimal to the add function.

HTML Code

Enter the First number:  
Enter the Second number:

  

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JavaScript Function

function add(decimaldigits) {
var aLocal = parseFloat(document.getElementById("a").value);
var bLocal = parseFloat(document.getElementById("b").value);
alert(aLocal);
var result = aLocal + bLocal;
resultStr = result.toFixed(decimaldigits) + "<br>";
document.getElementById("output").innerHTML = resultStr;
}