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Cross Ref Guide

JAVASCRIPTLANGUAGE

JavaScript

JAVASCRIPTANDDELPHI PRISMTOC

Overview

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+Language Basics

End of Statement◄╣

+Language Details

+Data Structures

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+OOP Basics

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End of Statement (JavaScript and Delphi Prism Cross Reference Guide)

By Mike Prestwood

JavaScript versus Delphi Prism: A side by side comparison between JavaScript and Delphi Prism.

Language Basics

Language basics is kind of a catch all for absolute beginner stuff. The items (common names) I chose for language basics is a bit random and include items like case sensitivity, commenting, declaring variables, etc.

End of Statement

[Other Languages]

Languages Focus

In coding languages, common End of statement specifiers include a semicolon and return (others exist too). Also of concern when studying a language is can you put two statements on a single code line and can you break a single statement into two or more code lines.

JavaScript: ; is optional

In JavaScript, using a semicolon at the end of statements is optional. You might think a semicolon then is just another comment specifier but it is not. The semicolon is an optional end of statement specifier. To put two statements on a single code line, you must use a semicolon. However, the semicolon is optional, but probably confusing, when you break a single statement into multiple code lines.

Syntax Example:

document.write("Hello1");
document.write("Hello2");
 
//Semicolons are optional:
document.write("Hello3")
document.write("Hello4")
 
//This works too but only if you use a semicolon:
document.write("Hello5");  document.write("Hello6");
 
//Two lines also works:
document.write
  ("Hello7")

JavaScript End of Statement (; is optional)

Delphi Prism: ;

Object Pascal uses a semicolon ";" as an end of statement specifier and you can put multiple statements on a single line of code and put a single statement on two or more code lines if you wish.

Syntax Example: 1 certification question.

MessageBox.Show("Hello1");

MessageBox.Show("Hello2");

MessageBox.Show("Hello3");
 
//Same line works too:

MessageBox.Show("Hello4");  MessageBox.Show("Hello5");
 
//Two or more lines works too: 
MessageBox.Show
  ("Hello6");