Language
Unlike other programming languages, the syntax of VDS is very simple. Each command occupies one line, and has a plain English name that clearly describes its purpose. Variables are typeless, and can hold many kinds of information, for example, numbers or text. Functions are clearly distinguishable with names that start with '@', just like a spreadsheet.
The DialogScript language has a simple syntax not unlike MS-DOS batch language. It is designed for ease of use and efficiency when being interpreted by the run-time engine. There are 10 system variables, %0 to %9, which initially have the script file name in %0 and command line parameters in %1 through %9, just as in a batch file. There are also a further 26 user variables, %A to %Z. The contents of all variables (including system ones) can be changed once the script is running. There are now also 4032 global variables. These variables begin with %%, a letter, then alphanumerics plus underscores (e.g. %%my_variable_1.) There is no limit on the length of these user-defined variable names.
Read more about this topic: Visual DialogScript
Famous quotes containing the word language:
“Syntax is the study of the principles and processes by which sentences are constructed in particular languages. Syntactic investigation of a given language has as its goal the construction of a grammar that can be viewed as a device of some sort for producing the sentences of the language under analysis.”
—Noam Chomsky (b. 1928)
“So runs my dream: but what am I?
An infant crying in the night;
An infant crying for the light:
And with no language but a cry.”
—Alfred Tennyson (1809–1892)
“We find that the child who does not yet have language at his command, the child under two and a half, will be able to cooperate with our education if we go easy on the “blocking” techniques, the outright prohibitions, the “no’s” and go heavy on “substitution” techniques, that is, the redirection or certain impulses and the offering of substitute satisfactions.”
—Selma H. Fraiberg (20th century)