JS Function

Function is a block of code to use a particular task that means many times reuse the code.

Syntax:

  function name(parameter1, parameter2, parameter3) {
   // code to be executed
}

Example:

 <script>  
function msg(){  
alert("Good Morning.");  
}  
</script>  
<input type="button" onclick="msg()" value="Click Here"/>  

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JavaScript Function Parameters or Arguments

Pass the parameters in function.

Example:

<script>  
function getcube(num){  
alert(num*num*num);  
}  
</script>  
<form>  
<input type="button" value="Click Here" onclick="getcube(2)"/>  
</form>    

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JavaScript Function Return Value

call the function returns a value .

Example:

  <script>  
function msg(){  
return "Hello,How are you.";  
}  
</script>  
<script>  
document.write(msg());  
</script>  

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JS Tutorials

JS Function

JavaScript Function Parameters or Arguments

JavaScript Function Return Value