Tiny BASIC operating in the mobile terminal

command:
 '& Lt; LineNum & gt; & lt; statement & gt;': add line
 '& Lt; LineNum & gt;': remove line & lt; lineNum & gt;
 'RUN': run program
 'NEW': clear program
 'LIST': print program
 'RENUM': renumber program
 'LOAD & lt; fileName & gt;': load from & lt; fileName & gt;
 'SAVE & lt; fileName & gt;': save to & lt; fileName & gt;
 'DIR': print saved files list

statement:
 '& Lt; var & gt; = & lt; exp & gt;' assign & lt; exp & gt; to & lt; var & gt;
 'PRINT {& lt; exp & gt; | & lt; string & gt;}': print & lt; exp & gt; or & lt; string & gt;
 'IF & lt; exp & gt; THEN {& lt; statement & gt; | & lt; lineNum & gt;}': if & lt; exp & gt; then exec
 'FOR & lt; var & gt; = & lt; exp1 & gt; TO & lt; exp2 & gt;': for loop
 'NEXT': inc & lt; var & gt; and loop
 'GOTO & lt; lineNum & gt;': jump to line & lt; lineNum & gt;
 'GOSUB & lt; lineNum & gt;': call subroutine
 'RETURN': return from subroutine
 'END'
 
expression:
& Lt; exp & gt; :: = & lt; term & gt; | & lt; term & gt; & lt; op & gt; & lt; exp & gt;
& Lt; term & gt; :: = [-] {& lt; digits & gt; | & lt; var & gt; | (& lt; exp & gt;)}
& Lt; var & gt; :: = A | B | ... | Z | @ (& lt; exp & gt;)
& Lt; op & gt; :: = AND | OR | = | & lt; & gt; | & gt; | & gt; = | & lt; | & lt; = | + | - | * | / |%

Website: http://vivi.dyndns.org/games/TinyBASIC/