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Return statement JavaScript

//Why do we need to use return statement? //For example: function add (x, y) { console.log(x + y); } add(10,20); // Will work and value will be 30. //But, if added to reuse in a variable, it won't work? //Example let sum = add(10,20); //Value will be undefined? Why?

18th Mar 2022, 12:46 AM
Jonathan P. Jundarino
Jonathan P. Jundarino - avatar
5 ответов
+ 3
Functions are small blocks of code that will do things or return things: Your function is a do something function In your example: function add(x, y){ console.log(x + y) } any call to add will ask the function add to output (x + y) on the standard output stream to have your function return something so you can reuse it you have to use the return keyword function add(x, y) { return x + y; } This is going to return the x + y back to the caller. let sum = add(10, 20) sum will now be assigned the value of 30 You could also: console.log(add(10,20)) and get the same out put of 30 like in the first example. Hope that helps, happy coding.
18th Mar 2022, 1:38 AM
William Owens
William Owens - avatar
+ 4
Jonathan P. Jundarino Because you didn't return value. learn about 'return'
18th Mar 2022, 12:46 AM
A͢J
A͢J - avatar
+ 1
The community is full of some great individuals sharing information. Wish you well my friend.
18th Mar 2022, 1:49 AM
William Owens
William Owens - avatar
0
A͢J thanks. I returned to comment section of return statement inside JavaScript course here. So, when we assign the function inside a variable, it will only do it's job, which is computing the expression. "If you tell me to compute 3+3 then I will only compute" I read something like that. So that's why we need return statement.
18th Mar 2022, 1:36 AM
Jonathan P. Jundarino
Jonathan P. Jundarino - avatar
0
William Owens thanks so much. I love sololearn community because of people who will answer the questions.
18th Mar 2022, 1:41 AM
Jonathan P. Jundarino
Jonathan P. Jundarino - avatar