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A function is a set of statements that take inputs, do some specific computation, and produce output. The idea is to put some commonly or repeatedly done tasks together and make a function so that instead of writing the same code again and again for different inputs
Syntax
function functionName(Parameter1, Parameter2, ..)
{
// Function body
}
example
<!DOCTYPE html>
<html>
<head>
<title> alert in javascript</title>
</head>
<body>
<script>
function f1()
{
document.write("this is function");
document.write("<br>");
document.write("in javascript");
}
function f2()
{
document.write("using multiple ");
document.write("function");
}
f1();
document.write("<br>");
f2();
</script>
</body>
</html>output
this is function
in javascript
using multiple function
