JavaScript for BASIC Programmers: Difference between revisions
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| Dim a || var a;<br>var b,c;<br>var d = 100; | | Dim a || var a;<br>var b,c;<br>var d = 100; | ||
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In JavaScript, you can declare multiple variables in one statement. You can also assign an initial value. | |||
=== Assignment === | === Assignment === | ||
Revision as of 12:59, 26 July 2017
AppStudio's BASIC is modelled on Microsoft's Visual BASIC. It runs on other operating system by translating the BASIC to JavaScript, a language which is supported on all platforms.
JavaScript is a powerful and flexible programming language. It's the standard programming language of the web. It's also the subject of Atwood's Law: "Any application that can be written in JavaScript, will eventually be written in JavaScript."
When we designed our Translator, we were pleased to discover that almost everything in BASIC had a direct equivalent in JavaScript. Each BASIC statement could be turned into a JavaScript statement which did the same thing. (The reverse is not true: there are many features in JavaScript which do not have an equivalent in BASIC.)
Variable Types
JavaScript variables are not explicitly typed: they get their types from whatever is assigned to them. It's very similar to BASIC's Variant type.
Variables are declared with the VAR statement:
| BASIC | JavaScript |
|---|---|
| Dim a | var a; var b,c; var d = 100; |
In JavaScript, you can declare multiple variables in one statement. You can also assign an initial value.