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Quick Tiny BASIC reference

Lines without number are executed immediately. Line overwrite previous with same number if it exists.

Valid variable names are capital letters from A to Z

Math operators are +, -(unary and binary), /, *.

Comparison operators are =, >, >=, <, <=, <>

Main operators

PRINT expr|string, expr|string, ...

Outputs expression result or string

INPUT var-1, var-2, ...

Read number from input to variable

LET var = expr

Calculates expression and put result in variable

GOTO lineNumber

Jump to specified line number

GOSUB lineNumber

Jump to specified line number and save current for return

RETURN

Jump to line after last executed GOSUB operator

IF expr comparison expr THEN statement

Execute statement if comparison result is true

END

Stop execution and jump to start

RUN

Execute store program lines starting from lowest

CLEAR

Clear variables and program

More details about TinyBASIC: https://en.wikipedia.org/wiki/Tiny_BASIC and http://www.ittybittycomputers.com/IttyBitty/TinyBasic/DDJ1/Design.html

Extensions

Some extensions are based on Tom Pittman interpreter

Variable can be declared as array using DIM operator. Expression A(X) should be used for accessing or assignment, where A is array variable name and X is expression used as index.

Functions

Functions can be used in calculated expressions

RND(x)

Returns random number from 0 to x

ASC("L")

Returns ASCII code of letter L

USR(expr, expr, ...)

Calls user-defined function and return result

Operators

REM anything

Commentary, skipped by interpreter

DIM var(size)

Declare variable as array of specified size (can be expression)

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