+- addition-- subtraction*- multiplication/- division\- integer division%- modulus^- exponentiation
<=- less than or equal to<- less than=- equal to<>- not equal to><- not equal to>- greater than>=- greater than or equal to
Remark has no effect on the execution of the program and acts as a comment to the developer. The remark can contain any character.
Example:
10 REM anything after "REM" is considered a comment and ignored by the interpreter.
Prints the contents of 'list' to the console where 'list' is a comma separated list of one or more quoted strings, expressions, and/or variables.
Example:
10 PRINT 2,"+",2,"=",2+2
Evaluates both 'expression's and compares them using relational operator 'relop'. If the relation is true, then the statement will be executed. Otherwise, the statement is skipped.
Example:
1000 PRINT "Enter a number:"
1010 INPUT A
1020 REM Absolute value of A
1030 IF A < 0 THEN LET A = -A
1040 PRINT "The absolute value of the number entered is: ",A
Evaluates 'expression' and jumps to the corresponding line number. It may appear with with or without whitespace between GO and TO. For example, both GOTO 70 and GO TO 70 are equivalent.
Example:
10 PRINT "How old are you?"
20 INPUT A
30 IF A >= 40 THEN GOTO 60
40 PRINT "You are too young!"
50 GOTO 70
60 PRINT "You are over the hill!"
70 END
Given a comma separated list of 1 or more variables, this command will prompt the user to enter a comma separated list of expressions. The value of each expression will be assigned to each corresponding variable.
Example:
10 PRINT "Enter 2 numbers to multiply:"
20 INPUT A,B
30 PRINT "The product of ",A," and ",B," is ",A*B
Evaluates the first 'expression' and assigns the result to the index variable
'var' when entering the loop. Before each iteration, the second expression is
evaluated and compared to the index variable. If the limit is not exceeded,
another iteration takes place. At the end of each iteration, the step
'expression' is evaluated and added to the index variable. If a step 'expression'
is not provided, the step defaults to 1.
Example:
10 PRINT "Squares of integers from 1 to 10"
20 FOR I = 1 TO 10
30 PRINT I^2
40 NEXT I
50 END
Evaluates 'expression' and jumps to the corresponding line number after saving the current line number. It may appear with with or without whitespace between GO and SUB. For example, both GOSUB 100 and GO SUB 100 are equivalent.
Example:
10 PRINT "Enter 2 numbers to multiply:"
20 INPUT A,B
30 GOSUB 100
40 PRINT "The product of ",A," and ",B," is ",C
50 END
100 REM Multiply Subroutine
110 LET C = A*B
120 RETURN
Returns control to the line after the last 'GOSUB' call.
Example:
10 PRINT "Enter 2 numbers to multiply:"
20 INPUT A,B
30 GOSUB 100
40 PRINT "The product of ",A," and ",B," is ",C
50 END
100 REM Multiply Subroutine
110 LET C = A*B
120 RETURN
Assigns the value of expression to variable 'var' where 'var' is a single character variable name in the range from A to Z.
Example:
10 LET A = 2
20 LET B = 2
30 LET C = A + B
40 PRINT A,"+",B,"=",C
Ends the execution of the program.
Example:
10 PRINT "Hello, World"
20 END
30 REM Nothing is executed after the 'END' statement is executed.
40 PRINT "Nothing to see here"
Exits the interpreter.
Example:
STOP
System beep.
Example:
100 BEEP
Executes a shell command.
Example:
100 PRINT "Current uptime:"
200 SHELL "uptime"
Re-seeds the random number generator, causing RND to return a different sequence of random numbers.
Example:
10 REM Flip a coin and print HEADS or TAILS
15 RANDOMIZE
20 LET C = RND
30 IF C < 0.5 THEN PRINT "HEADS"
40 IF C >= 0.5 THEN PRINT "TAILS"
Clears the screen.
Example:
10 REM Clear screen and print "Hello"
20 CLS
30 PRINT "Hello"
Clears the program from memory and sets all variables to 0.
Example:
CLEAR
Prints the current program.
Example:
LIST
Renumber lines in memory.
Example:
1 REM FOO
2 REM BAR
5 REM BAZ
RENUM
LIST
10 REM FOO
20 REM BAR
30 REM BAZ
Executes the current program.
Example:
RUN
Turn off debug tracing.
TROFF
Turn on debug tracing. When on, debug tracing prints "TR> " followed by the line that is about to be executed. Use TROFF to turn tracing off.
10 PRINT "HELLO"
20 PRINT "GOODBYE"
TRON
RUN
TR> 10 PRINT "HELLO"
HELLO
TR> 20 PRINT "GOODBYE"
GOODBYE
Symbol evaluates to Pi (3.14159265)
Example:
10 PRINT "Enter the radius of the circle"
20 INPUT r
30 LET c = 2 * π * r
40 PRINT "Circumference of circle with radius ",r," is ", c
Returns a random number in the range [0,1). The same sequence of numbers is returned in each program run. Use the RANDOMIZE statement to generate different sequences in each program run.
Example:
10 REM Flip a coin and print HEADS or TAILS
20 LET C = RND
30 IF C < 0.5 THEN PRINT "HEADS"
40 IF C >= 0.5 THEN PRINT "TAILS"
Returns the number of seconds since midnight.
Example:
10 PRINT TIME
Returns the sine of the given expression (measured in radians).
Example:
110 LET A = SIN((0*3.1415926)/2)
Returns the cosine of the given expression (measured in radians).
Example:
210 LET A = COS((0*3.1415926)/2)
Returns the tangent of the given expression (measured in radians).
Example:
320 LET B = TAN(-3)
Returns the cotangent of the given expression (measured in radians).
Example:
420 LET B = COT(-0.01)
Returns the arctangent of the given expression (measured in radians).
Example:
530 LET C = ATN(1.0)
Returns e to the power of the given expression.
Example:
610 LET A = EXP(2.0)
Returns the natural logarithm of of the given expression.
Example:
720 LET B = LOG(2)
Returns the absolute value of the given expression.
Example:
840 LET D = ABS(-2.0)
Returns the integer portion of the given expression.
Example:
905 LET T = INT(RND * 100) + 1
Returns the sign of the given expression. 1 if expression > 0, 0 if expression = 0, -1 if expression < 0.
40 LET S = SGN(3.14159)
Returns the square root of the given expression.
Example:
920 LET B = SQR(2)