JavaScript - Break And Continue
JavaScript functions are used to perform operations. We can call JavaScript function many times to reuse the code.
Advantage of JavaScript function
There are mainly two advantages of JavaScript functions.
Code reusability : We can call a function several times so it save coding.Less coding : It makes our program compact. We don’t need to write many lines of code each time to perform a common task.
JavaScript Function Syntax
The syntax of declaring function is given below.
function functionName([arg1, arg2, ...argN]){
JavaScript Functions can have 0 or more arguments.
JavaScript Function Example
Let’s see the simple example of function in JavaScript that does not has arguments.
See this example:
<script>
Output:
JavaScript Function Arguments
We can call function by passing arguments. Let’s see the example of function that has one argument.
See this example:
<script>
Output:
Function with Return Value
We can call function that returns a value and use it in our program. Let’s see the example of function that returns value.
See this example:
<script>
Output:
