gaurav bhardwaj

Thank you for reply,But i do not understand the concept.Yes this is right return statement use to get a value return from function ,But Where should I use that ,because i am getting same answer by example first,And if i fix the value in return statement so I will get the that value rather It does matter how the function design or write

if i take this example

function add_num(){

var num1=10;

var num2=10;

var num3=num1+num2;

document.write(num3);

}

add_num();

and

function add_num(){

var num1=10;

var num2=10;

var num3=num1+num2;

return num3;

}

var total_num=add_num();

document.write(total_num);

Q.1-:Why do we use return statement ,

Q.2-:When we get the same answer by example no .1 so why do we use return statement.

Q.3-:If I change the return statement like ;(return 50;) and call the function ,I got the 50 .rather then it should be 20. why.