FAQ: Functions - Calling a Function

[wiki-bot]

This community-built FAQ covers the “Calling a Function” exercise from the lesson “Functions”.

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This exercise can be found in the following Codecademy content:

Web Development

Introduction To JavaScript

FAQs on the exercise Calling a Function

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[buckethead1494155129]

On page 3 of 11, there seems to be a broken image tag. After the sentence “This function call executes the function body, or all of the statements between the curly braces in the function declaration.”, the following appears next to an empty white square: “Function execution diagram”

[leeleeza]

I think this is the image:

[jon_morris]

Thanks for posting the diagram. Mine appears as just an empty square too. I’m using Chrome browser - do you think it could be a browser compatibility issue? How did you get the image to appear?.. or do you have a separate, secret source? )

[_31337]

https://s3.amazonaws.com/codecademy-content/courses/learn-javascript-functions/Diagram/function+execution.svg

try updating your Chrome

[will_hm]

It worked fine for me on Firefox. But it would help if Codecademy could magnify the image on this exercise and the next. It required some mighty squinting (and zooming in) on my laptop to see everything properly.

[tucats]

What am I doing wrong here?

[data9469241161]

I had the same problem today. I did not understand what the mistake was. When I received the solution, I found no difference.

[aradman21]

Is there any way to call a function multiple times without manually calling it over and over again? Is there some sort of math feature?

[fahimemroz6542932912]

How is this different from a variable apart from the syntax. I mean this ‘Function’ is also storing information right?

[agentgenx]

Hmm, maybe try a semicolon at the end of line #2.

[jarauld]

This is good, but, this is doing a just a console.log three times, how can i do a comand to repeat the same action three times without need to write it three time? Any function for that?

(I’m quite new in learning how to code! ha!)

[markholley]

Here you go.

function sayThanks()
{
  console.log("Thank you for your purchase! We appreciate your business.");
}

var i = 1;
while (i <= 3)
{
  sayThanks();
  i++;
}

[vic-st]

But is this the most optimal way to do it?

What about a for loop?

for(var i = 0; i < 3; i++) {
  console.log("Hello");
}

Wouldn’t that be more efficent?

[markholley]

At this point? From what I’ve read, probably not much difference. If you’re coding enterprise stuff then the for loop might gain you a couple of ticks depending on the compiler.

[vic-st]

More efficient though, and you don’t have an extra global variable.

[markholley]

All righty. If you say so.

[vic-st]

Haha, don’t say that. What if I’m completely wrong? Defend your position!

Why do you think a while loop is better for the task?

[markholley]

I don’t think that a while loop is better for the task. I think that, in terms of program efficiency, (speed at runtime), the while loop and the for loop will perform the same.

Also, if you’re declaring i outside of the encompassing function block, (making it global in scope), for either the while or for loop, then you’re not following generally-accepted best practices. The i from neither the for nor while loop should live to see the outside of the function it’s in.

[vic-st]

Hrm, that’s a good point. Is there any reason at all that you used a while loop instead of a for loop?