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JavaScript

Posted by moath alqutoob
moath alqutoob
2,450 Points

ask for code in java script

i need some one Explains me this 

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Untitled Document</title>
</head>

<body>
<script>

i need some one explane to me some part in the cod

1-what this mean 

function print(message) {
  document.write( '<p>' + message + '</p>');
}

why we put message what is message is it keyword in java script or parameter and message in the document .write what mean

then

what this code mean there are 2 parameter in it but the function function print(message) hav one

but there are 2 

print( search + ' is not in stock.'); 

var inStock = [ 'apples', 'eggs', 'milk', 'cookies', 'cheese', 'bread', 'lettuce', 'carrot', 'broccoli', 'pizza', 'potato', 'crackers', 'onion', 'tofu', 'frozen dinner', 'cucumber'];
var search;

function print(message) {
  document.write( '<p>' + message + '</p>');
}

while (true) {
  search = prompt("Search for a product in our store. Type 'list' to show all of the produce and 'quit' to exit");
  search = search.toLowerCase();
  if ( search === 'quit') {
    break;
  } else if ( search === 'list' ) {
    print( inStock.join(', ') ); 
  } else {
    if ( inStock.indexOf( search ) > -1 ) {
      print( 'Yes, we have ' + search + ' in the store.');
    } else {
      print( search + ' is not in stock.'); 
    }
  }
}
Samuel Webb
Samuel Webb
25,370 Points
Samuel Webb
Samuel Webb
25,370 Points

I formatted your code to make it a bit easier for people to read. Please try to do this in the future. For information on how I did the code blocks, either go to 'edit question' or click the Markdown Cheatsheet at the bottom of the Add Comment and Add an Answer sections.

6 Answers

Gabriel Ward
Gabriel Ward
20,222 Points
Gabriel Ward
Gabriel Ward
20,222 Points

Hi Moath,

Are you referring to 

function print(message) { document.write( '' + message + ''); 
}

as the function with 2 parameters in it?

The piece of code

{ document.write( '' + message + ''); }

is not two parameters. It is the code the executes inside the function, which in this case accepts message as a parameter.

moath alqutoob
moath alqutoob
2,450 Points
moath alqutoob
moath alqutoob
2,450 Points

print( 'Yes, we have ' + search + ' in the store.'); there 3 1-'Yes, we have 2-search 3-in the store i mean this function print(message) message is parameter can i put moare than 1 in print() function

Gabriel Ward
Gabriel Ward
20,222 Points
Gabriel Ward
Gabriel Ward
20,222 Points

I believe so,

function print(message, //another parameter can go here) { 
   document.write( '' + message + ''); 
}

What would you want to add?

moath alqutoob
moath alqutoob
2,450 Points
moath alqutoob
moath alqutoob
2,450 Points

thanks but what this cod do
document.write( '<p>' + message + '</p>'); i mean why the teacher put this code in the example

Gabriel Ward
Gabriel Ward
20,222 Points
Gabriel Ward
Gabriel Ward
20,222 Points

It should actually be 

document.write( '<p>' + message + '</p>');

This is added to the code to print a response to the user's answer. The answer is generated by the user entering a search into the prompt which comes from 

while (true) { search = prompt("Search for a product in our store. Type 'list' to show all of the produce and 'quit' to exit"); search = search.toLowerCase(); if ( search === 'quit') { break; } else if ( search === 'list' ) { print( inStock.join(', ') ); } else { if ( inStock.indexOf( search ) > -1 ) { print( 'Yes, we have ' + search + ' in the store.'); } else { print( search + ' is not in stock.'); }
moath alqutoob
moath alqutoob
2,450 Points
moath alqutoob
moath alqutoob
2,450 Points

i cant understand can you explane mor plz