Editing Atari BASIC (section)

==Keywords==
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|+ Atari BASIC keywords
! Keyword !! Description
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| style="font-weight:bold; text-align:right" | ABS || align="left" | Returns the [[absolute value]] of a number
|-
| style="font-weight:bold; text-align:right" | ADR || align="left" | Returns the address in memory of a variable (mostly used for machine code routines stored in variables)
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| style="font-weight:bold; text-align:right" | AND || align="left" | [[Logical conjunction]]
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| style="font-weight:bold; text-align:right" | ASC || align="left" | Returns the [[ATASCII]] value of a character
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| style="font-weight:bold; text-align:right" | ATN || align="left" | Returns the [[arctangent]] of a number
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| style="font-weight:bold; text-align:right" | BYE || align="left" | Transfers control to the internal "Self Test" program ("Memo Pad" on early models)
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| style="font-weight:bold; text-align:right" | CHR$ || align="left" | Returns a character given an [[ATASCII]] value
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| style="font-weight:bold; text-align:right" | CLOAD || align="left" | Loads from [[cassette tape]] a [[Tokenization (data security)|tokenized]] program that was saved with CSAVE
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| style="font-weight:bold; text-align:right" | CLOG || align="left" | Returns the [[common logarithm]] of a number
|-
| style="font-weight:bold; text-align:right" | CLOSE || align="left" | Terminates pending transfers (flush) and closes an I/O channel
|-
| style="font-weight:bold; text-align:right" | CLR || align="left" | Clears variables' memory and program stack
|-
| style="font-weight:bold; text-align:right" | COLOR || align="left" | Chooses which logical color to draw in
|-
| style="font-weight:bold; text-align:right" | COM || align="left" | Implementation of MS Basic's COMMON was cancelled. Recognized but the code for DIM is executed instead
|-
| style="font-weight:bold; text-align:right" | CONT || align="left" | Resumes execution of a program after a STOP at the next line number (see STOP)
|-
| style="font-weight:bold; text-align:right" | COS || align="left" | Returns the [[cosine]] of a number
|-
| style="font-weight:bold; text-align:right" | CSAVE || align="left" | Saves to [[cassette tape]] a program in [[Tokenization (data security)|tokenized]] form (see CLOAD)
|-
| style="font-weight:bold; text-align:right" | DATA || align="left" | Stores data in lists of numeric or string values
|-
| style="font-weight:bold; text-align:right" | DEG || align="left" | Switches trigonometric functions to compute in [[degree (angle)|degrees]] ([[radian]]s is the default mode) (see RAD)
|-
| style="font-weight:bold; text-align:right" | DIM || align="left" | Defines the size of a string or array (see COM)
|-
| style="font-weight:bold; text-align:right" | DOS || align="left" | Transfers control to the Disk Operating System (DOS); if DOS was not loaded, same as BYE
|-
| style="font-weight:bold; text-align:right" | DRAWTO || align="left" | Draws a line to given [[Cartesian coordinate system|coordinates]]
|-
| style="font-weight:bold; text-align:right" | END || align="left" | Finishes execution of the program, closes open I/O channels and stops any sound
|-
| style="font-weight:bold; text-align:right" | ENTER || align="left" | Loads and merges into memory a plain text program from an external device, usually from [[cassette tape]] or disk (see LIST)
|-
| style="font-weight:bold; text-align:right" | EXP || align="left" | [[Exponential function]]
|-
| style="font-weight:bold; text-align:right" | FOR || align="left" | Starts a [[for loop]]
|-
| style="font-weight:bold; text-align:right" | FRE || align="left" | Returns the amount of free memory in bytes
|-
| style="font-weight:bold; text-align:right" | GET || align="left" | Reads one byte from an I/O channel (see PUT)
|-
| style="font-weight:bold; text-align:right" | [[GOSUB]] || align="left" | Jumps to a subroutine at a given line in the program, placing the return address on the stack (see POP and RETURN)
|-
| style="font-weight:bold; text-align:right" | [[GOTO]] and GO TO || align="left" | Jumps to a given line in the program. GOTO can be omitted in "IF ... THEN GOTO ..."
|-
| style="font-weight:bold; text-align:right" | GRAPHICS || align="left" | Sets the graphics mode
|-
| style="font-weight:bold; text-align:right" | IF || align="left" | Executes code depending on whether a condition is true or not
|-
| style="font-weight:bold; text-align:right" | INPUT || align="left" | Retrieves a stream of text from an I/O channel; usually data from keyboard (default), [[cassette tape]] or disk
|-
| style="font-weight:bold; text-align:right" | INT || align="left" | Returns the [[floor and ceiling functions|floor]] of a number
|-
| style="font-weight:bold; text-align:right" | LEN || align="left" | Returns the length of a string
|-
| style="font-weight:bold; text-align:right" | LET || align="left" | Assigns a value to a variable. LET can be omitted
|-
| style="font-weight:bold; text-align:right" | LIST || align="left" | Lists (all or part of) the program to screen (default), printer, disk, [[cassette tape]], or any other external device (see ENTER)
|-
| style="font-weight:bold; text-align:right" | LOAD || align="left" | Loads a [[Tokenization (data security)|tokenized]] program from an external device; usually a [[cassette tape]] or disk (see SAVE)
|-
| style="font-weight:bold; text-align:right" | LOCATE || align="left" | Stores the logical color or [[ATASCII]] character at given coordinates
|-
| style="font-weight:bold; text-align:right" | LOG || align="left" | Returns the [[natural logarithm]] of a number
|-
| style="font-weight:bold; text-align:right" | LPRINT || align="left" | Prints text to a printer device (same result can be achieved with OPEN, PRINT and CLOSE statements)
|-
| style="font-weight:bold; text-align:right" | NEW || align="left" | Erases the program and all the variables from memory; automatically executed before a LOAD or CLOAD
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| style="font-weight:bold; text-align:right" | NEXT || align="left" | Continues the next iteration of a FOR loop
|-
| style="font-weight:bold; text-align:right" | NOT || align="left" | [[Negation|Logical negation]]
|-
| style="font-weight:bold; text-align:right" | NOTE || align="left" | Returns the current position on an I/O channel
|-
| style="font-weight:bold; text-align:right" | ON || align="left" | A [[computed goto]] or gosub - performs a jump based on the value of an expression
|-
| style="font-weight:bold; text-align:right" | OPEN || align="left" | Initialises an I/O channel
|-
| style="font-weight:bold; text-align:right" | OR || align="left" | [[Logical disjunction]]
|-
| style="font-weight:bold; text-align:right" | PADDLE || align="left" | Returns the position of a [[paddle (game controller)|paddle controller]]
|-
| style="font-weight:bold; text-align:right" | [[PEEK and POKE|PEEK]] || align="left" | Returns the value at an address in memory
|-
| style="font-weight:bold; text-align:right" | PLOT || align="left" | Draws a point at given coordinates
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| style="font-weight:bold; text-align:right" | POINT || align="left" | Sets the current position on an I/O channel
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| style="font-weight:bold; text-align:right" | [[PEEK and POKE|POKE]] || align="left" | Sets a value at an address in memory
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| style="font-weight:bold; text-align:right" | POP || align="left" | Removes a subroutine return address from the stack (see GOSUB and RETURN)
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| style="font-weight:bold; text-align:right" | POSITION || align="left" | Sets the position of the graphics cursor
|-
| style="font-weight:bold; text-align:right" | PRINT and ? || align="left" | Writes text to an I/O channel; usually to screen (default), printer, [[cassette tape]] or disk (see LPRINT and INPUT)
|-
| style="font-weight:bold; text-align:right" | PTRIG || align="left" | Indicates whether a paddle trigger is pressed or not
|-
| style="font-weight:bold; text-align:right" | PUT || align="left" | Writes one byte to an I/O channel (see GET)
|-
| style="font-weight:bold; text-align:right" | RAD || align="left" | Switches trigonometric functions to compute in [[radian]]s (see DEG)
|-
| style="font-weight:bold; text-align:right" | READ || align="left" | Reads data from a DATA statement
|-
| style="font-weight:bold; text-align:right" | REM || align="left" | Marks a comment in a program
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| style="font-weight:bold; text-align:right" | RESTORE || align="left" | Sets the position of where to read data from a DATA statement
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| style="font-weight:bold; text-align:right" | RETURN || align="left" | Ends a subroutine, effectively branching to the line immediately following the "calling" GOSUB (see GOSUB and POP)
|-
| style="font-weight:bold; text-align:right" | RND || align="left" | Returns a [[pseudorandom number generator|pseudorandom number]]
|-
| style="font-weight:bold; text-align:right" | RUN || align="left" | Starts execution of a program, optionally loading it from an external device (see LOAD)
|-
| style="font-weight:bold; text-align:right" | SAVE || align="left" | Writes a [[Tokenization (data security)|tokenized]] program to an external device; usually a [[cassette tape]] or disk (see LOAD)
|-
| style="font-weight:bold; text-align:right" | SETCOLOR || align="left" | Maps a logical color to a physical color
|-
| style="font-weight:bold; text-align:right" | SGN || align="left" | Returns the [[sign function|signum]] of a number
|-
| style="font-weight:bold; text-align:right" | SIN || align="left" | Returns the [[sine and cosine|sine]] of a number
|-
| style="font-weight:bold; text-align:right" | SOUND || align="left" | Starts or stops playing a tone on a sound channel (see END)
|-
| style="font-weight:bold; text-align:right" | SQR || align="left" | Returns the [[square root]] of a number
|-
| style="font-weight:bold; text-align:right" | STATUS || align="left" | Returns the status of an I/O channel
|-
| style="font-weight:bold; text-align:right" | STEP || align="left" | Indicates the increment used in a FOR loop
|-
| style="font-weight:bold; text-align:right" | STICK || align="left" | Returns a [[joystick]] position
|-
| style="font-weight:bold; text-align:right" | STOP || align="left" | Stops the program, allowing later resumption (see CONT)
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| style="font-weight:bold; text-align:right" | STRIG || align="left" | Indicates whether a joystick trigger is pressed or not
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| style="font-weight:bold; text-align:right" | STR$ || align="left" | Converts a number to string form
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| style="font-weight:bold; text-align:right" | THEN || align="left" | Indicates the statements to execute if the condition is true in an IF statement
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| style="font-weight:bold; text-align:right" | TO || align="left" | Indicates the limiting condition in a FOR statement
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| style="font-weight:bold; text-align:right" | TRAP || align="left" | Sets to jump to a given program line if an error occurs (TRAP 40000 cancels this order)
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| style="font-weight:bold; text-align:right" | USR || align="left" | Calls a machine code routine, optionally with parameters
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| style="font-weight:bold; text-align:right" | VAL || align="left" | Returns the numeric value of a string
|-
| style="font-weight:bold; text-align:right" | XIO || align="left" | General-purpose I/O routine (from "Fill screen" to "Rename file" to "Format disk" instructions)
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