Text commands

  • var name[[size]][$] - declares variable, optional argument size creates table.

    • var number
    var string$="text"
    var array[500]
    var stringarray[10]$

  • let name=[data] - imputes data to variable.

    • let x[3]=5
    let x$="one"+"two"

  • print [data];[data]... - prints variables, semicolon links data.

    • print "x=";x;"."

  • input [question];[var] - reads data to variable.

    • input "Enter number:";x

  • clr - clears screen.

  • if [exp] then [command] - if statement, example: if x > 5 then print \"Is greater\".

  • else [command] - extecutes [command] if previous if statement was false.

  • mark [label] - marks position, use with goto.

    • mark loop

  • goto [label] - goes to previously marked position.

    • goto loop

  • for [var]=[val] to [end var] - imputes [val] to [var] and executes the loop until [var] is equal to [end var].

    • for x=0 to 10

  • next [var] - causes a incrementation of [var] and proceeding in loop.

    • next x

  • gosub [label] - goes to previously marked subroutine.

    • gosub func

  • return - returns from subroutine.

    • Graphic commands

  • gclr - clears screen.

  • rect x, y, width, height, fill, [color] - draws rectangle, if fill is not equal to 0 rectangle will be filled with color, color is numeric value.

    • rect 0, 0, 10, 10, 1, 255*red+120*green+3*blue

  • circle x, y, width, height, fill, [color] - draws circle, if fill is not equal to 0 circle will be filled with color, color is numeric value.

  • line x1, y1, x2, y2, [color] - draws line.

  • poly x1, y1, x2, y2, x3, y3, fill, [color] - x, y, width, height, fill, [color] - draws polygon, if fill is not equal to 0 polygon will be filled with color, color is numeric value.

  • gprint x, y, str$, [color] - prints str$ at x, y.\n

    • gprint 10, 10, s$+"text", 10*red+15*green+13*blue

    Arithmetic operators

  • (, ), *, /, +, -.

  • %len [var] - returns length of [var].

    • let x=%len "text"

  • %asc [var] - returns ASCII code of first character in [var].

    • let x=%asc "x"

  • %rand [var] - return random number from range from 0 to [var].

    • let x=%rand
    let x=%rand 20

  • %getkey - returns ASCII code of pressed key.

    • String operators

  • +, ; - connects strings.

  • %left$ [var],[num] - returns leftmost [num] characters of [var].

  • %right$ [var],[num] - returns rightmost [num] characters of [var].

  • %mid$ [var],[start],[num] - returns [num] characters of [var] starting at index [start].

  • %chr$ [num] - returns ASCII character whose code is [num].

    • Special variables

  • gwdt - screen width.

  • ghgt - screen height.

  • red - used when setting color.

  • green - used when setting color.

  • blue - used when setting color (ex. color=255*red+255*green+255*blue defines white).