Functions
- A function is a block of code used to perform a specific task.
Syntax:
function functionName(parameters) {
// Code to be executed
// This is the function's body
}
- function: This keyword is used to declare a function.
- functionName: This is the name of the function. Choose a descriptive and meaningful name for your function, following JavaScript naming conventions.
- parameters: These are optional. You can pass data into a function through parameters. Parameters act as variables within the function's scope, and you can use them in the function's body.
- {}: The curly braces enclose the function body. This is where you put the code that the function will execute.
Example:
<html>
<body>
<script>
function msg() {
alert("hello! this is message");
}
</script>
<input type="button" onclick="msg()" value="call function" />
</body>
</html>
Output: