LS Basic or Letter-Sum Basic is a simplified dialect of BASIC written by User:Simplemaker which operates entirely on the sums of the values of the letters of each command. This leads to a reasonably easy-to-use language which can be heavily obfuscated, because many words have the same score.
The scoring system is an essential part of LS Basic. Letters are assigned a value, starting with a = 1, b = 2, c = 3, ... This means commands such as
are completely equivalent to words with the same score, such as
Both of these have a score of 77. Scores ignore non-alphabetic characters as well as letter case. Before any program is executed, every word in the program is evaluated according to the scoring algorithm, and the resulting list of scores is interpreted and executed. This means commands, labels, variables, and constants all have many synonymous words.
Input and Output
There are two methods of output. The command
and all words with equivalent score will print a variables value as a decimal.
will print the ASCII character which represents a variable's value.
There is only one class of input command
Which stores a decimal input from the user into a variable.
Input Apple Print Apple
Equivalent Obfuscated Version
Smaller disco muses diner
Note how the obfuscated code does not have a newline. Newlines are ignored; all programs can be rewritten without them.
Goto and Lbl
In traditional basic, jumps are usually determined either by a line number system or a label system, and LS Basic follows the latter.
creates a label called "loop"
would make the program go to the corresponding label. However,
would also send execution to the label "loop," because two and loop have the same score. If multiple labels are declared with the same score, only the top one will be used.
If statements take the form
If varA condition varB label
Where varA and varB are variables, and condition is either lesser, equal, or greater. If the conditional test is true, the program execution moves to the given label. Otherwise, execution continues onto the next line.
will halt program execution.
input apple if apple equal one loop if apple equal zero null end lbl null print zero end lbl loop print one goto loop
snowed shard alb coined term bended unaided if fork takes hopped dogeared fob foe vigil stacker bulkhead gig dim biotic hammers damp oceans drive
In LS Basic, the variables zero, one, and ten are preloaded with their corresponding values. They can be reassigned, and are the only usable constants for constructing other numbers. Other values can be constructed using arithmetic operations.
Arithmetic is achieved through the let command. The let command allows for reverse-polish notation manipulation of variables.
let two equal one one plus done
This defines two as "1 1 +" which in infix notation is "1+1", or 2. Let statements must always end with "done," because newlines are ignored. Valid arithmetic operators include plus, minus, times, divide, and mod.
The following prints "HI WORLD!"
let two equal one one plus done let base equal ten two two two times times times ten minus done let letter equal base two plus done printchar letter let letter equal letter one plus done printchar letter let space equal two two times two times two times two times done printchar space let letter equal base ten two times plus two minus one minus done printchar letter let letter equal base ten plus one minus done printchar letter let letter equal base ten plus two plus done printchar letter let letter equal letter two one plus two times minus done printchar letter let letter equal base two minus done printchar letter let letter equal space one plus done printchar letter
It is likely that more efficient methods exist.