#14 JavaScript Tutorial | Functions

Functions are one of the fundamental building blocks in JavaScript.
A function is a JavaScript procedure—a set of statements that performs a task or calculates a value.
A JavaScript function is a block of code designed to perform a particular task.
A JavaScript function is executed when “something” invokes it (calls it).
Why Functions?
You can reuse code: Define the code once, and use it many times.
You can use the same code many times with different arguments, to produce different results.
Video by - Tanmay Sakpal

[yt.user-zull]

Its a very important video for JavaScript novice learners. Friends, learn more by playing with functions and do experiments on your own.

[warnithathilakarathna]

superbly explained.thanks a lot.in detailed you have explained.i got function theory correctly from this only.

[jvcreator]

or
function addNums(x, y){
c=x+y
document.write( "<br>" +"Addition is " + c )
}
addNums(2, 5)
will work fine

[reshmagaikwad]

Thanks sir for this videos on javascript

[dulalmedhi]

You should have shown how function helps in not making repetition

[chethanprabhu]

Great video. Btw along with _ we can also use $ in between variable names

[bikram]

When we are not using return addition takes place and we don't need to store in another variable but when we use return we need a variable to store details why?

[unbiasedclip]

Bro .... please make another video on Call back function or higher order function... because call back function is little more tricky....

[ankireddyambati]

Hi Tanmay, Great tutorials..one small suggestion, You can hide the file explorer on the left hand side in VS code to get more space for your browser or html page

[PrithigaRamalingam]

nice explanation sir ..but why can't we use let instead of var..? though var has the power of redeclaration.

[thenewway]

Make one dedicated video on Data structures plz

[anshikachowdhury]

Hi sir i just love your tutorials felt a fish out of water at school when i coundnt understand javascript you please provide a css tutorial as well ....

[sshvibha]

Nice explanation..brother..god bless u

[gurjeetsingh-qpwp]

What is the benefit of using return statement when we can easily get output by calling function name as well. Please Clear me out.

[beautieshelp]

Sir how return works please explain with a video

[harishankathi]

Sir can u explain why +total+ in between strings

[surajmahato]

Why we need to return values when we can get output without using return and printing values in function block

[meghnasharma]

why didn't we declared the variables a and b?
for eg: var a;
var b;

[joshuajash]

still i have to know y we are using the return returns to where?

[joshuajash]

i noted that .the word output automatically changed