https://github.com/boxbeam/nanobasic

An extremely minimal interpreter for BASIC with only a handful of legal instructions
https://github.com/boxbeam/nanobasic

Last synced: 2 days ago
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An extremely minimal interpreter for BASIC with only a handful of legal instructions

• Host: GitHub
• URL: https://github.com/boxbeam/nanobasic
• Owner: boxbeam
• Created: 2022-03-08T02:54:34.000Z (almost 3 years ago)
• Default Branch: master
• Last Pushed: 2022-03-10T19:21:41.000Z (almost 3 years ago)
• Last Synced: 2024-11-05T23:09:31.582Z (about 2 months ago)
• Language: Java
• Homepage:
• Size: 151 KB
• Stars: 1
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# NanoBASIC

An extremely minimal interpreter for BASIC with only a handful of legal instructions. Below is an example script which prints all numbers up to 1 million.

```basic

10 LET A = 0

20 LET A = A + 1

30 PRINT A

40 IF A >= 1000000 THEN GOTO 60

50 GOTO 20

60 PRINT "DONE"

```

To run a script, first clone this repository and build the jar using `./gradlew shadowJar`, then you may find the jar in the `build/libs` folder. You can run your script using `java -jar NanoBASIC-all.jar path/to/script.bas`.

## Instructions

`LET  = ` - Assign a variable to a numeric value

`PRINT ` - Print a numeric value

`PRINT "string"` - Print a string

`IF  THEN ` - Conditionally run an instruction

`GOTO ` - Jumps to a line number

`GOSUB ` - Jumps to a line number and pushes the previous line number onto the stack

`RETURN` - Returns to the last line pushed onto the stack

`INPUT ` - Reads a number from stdin and puts it into a variable

`END` - Ends the program