Function in JavaScript
What you will learn here about JavaScript
- What is function
- JavaScript function declaration
- JavaScript function example
- JavaScript function parameters
- JavaScript function return value
What is function
Function is block of code which is responsible for performing specific task. Function allows user to reuse the code. So function avoids code redundancy
JavaScript function declaration
In javascript function is declared using function keyword.
function example()
{
document.getElementById(‘result’).innerHTML=”This is just example”;
}
JavaScript function example
Example of function is given below
example();
function example()
{
document.getElementById(‘result’).innerHTML=”This is just another example”;
}
function example()
{
document.getElementById(‘result’).innerHTML=”This is just another example”;
}
JavaScript function parameters
JavaScript example of passing parameters to function is given below.
example(“Jon Dow”);
function example(name)
{
document.getElementById(‘result’).innerHTML=name;
}
function example(name)
{
document.getElementById(‘result’).innerHTML=name;
}
JavaScript function return value
JavaScript example of function returing value is given below. In JavaScript we don’t need to specify return type.
document.getElementById(‘result’).innerHTML=example();
function example()
{
return “Jon Dow”;
}
