ohryan / BASIC

Learning how to make a BASIC interpreter so I can implement one in my OS BubblesOS

BASIC

Learning how to make a BASIC interpreter so I can implement one in my OS BubblesOS

Todo

• Varriables
• Math
• Built-ins
• Strings

Docs

Commands

There are 3 commands LIST, LISTD and RUN
LIST will list you program as you entered it.
LISTD will list the tokenized version of your input, this is for debugging.
RUN will run your program.

Variables

You can set a variable with A=5. Variable names can be any capital letter. You can also set a variable to another variable and you can do a sismple one math or bitwise operation when assigning variables like C=A&B.

FOR Loops

In a FOR loop you can set a variable to a value and set the TO value it will stop at, You also need a NEXT statement sometime after to to signify the end.

10 FOR A=0 TO 5
20 PRINT A
30 NEXT A

output

0
1
2
3
4
5

IF Statements

In an if statment you can have a simple check then limited code after it. Possible checks are greater than(>), lesser than(<), greater than or equal(>=), lesser than or equal(<=) and equal ==

10 A=5
20 IF A>1 THEN PRINT "A is greater than 1 !"

output:

A is greater than 1 !