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TCBASIC(1) User Commands TCBASIC(1) NAME tcbasic - a small BASIC Interpreter written in C SYNOPSIS tcbasic [filename] DESCRIPTION tcbasic implements a small subset of BASIC in portable C. If the user specifies a filename on the command line or pipes data to tcbasic, the results will be written to standard out. If no file is specified, an interactive mode is started where a user can interact with the BASIC system directly. OPTIONS -h, -? --help Print a helpful message and exit -v --version Print version information and exit STATEMENTS REM remark Remark has no effect on the execution of the program and acts as a comment to the developer. The remark can contain any charac- ter. PRINT list 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. IF expression relop expression THEN statement 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. GOTO expression Evaluates 'expression' and jumps to the corresponding line num- ber. INPUT var_list Given a comma separated list of 1 or more variables, this com- mand will prompt the user to enter a comma separated list of ex- pressions. The value of each expression will be assigned to each corresponding variable. GOSUB expression Evaluates 'expression' and jumps to the corresponding line num- ber after saving the current line number. RETURN Returns control to the line after the last 'GOSUB' call. LET var = expression Assigns the value of expression to variable 'var' where 'var' is a single character variable name in the range from A to Z. END Ends the execution of the program. STOP Exits the interpreter. BEEP System beep. SHELL cmd Executes a shell command. RANDOMIZE Re-seeds the random number generator, causing RND to return a different sequence of random numbers. CLS Clears the screen. FUNCTIONS RND 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. TIME Returns the number of seconds since midnight. SIN (expression) Returns the sine of the given expression (measured in radians). COS (expression) Returns the cosine of the given expression (measured in radi- ans). TAN (expression) Returns the tangent of the given expression (measured in radi- ans). COT (expression) Returns the cotangent of the given expression (measured in radi- ans). ATN (expression) Returns the arctangent of the given expression (measured in ra- dians). EXP (expression) Returns e to the power of the given expression. LOG (expression) Returns the natural logarithm of of the given expression. ABS (expression) Returns the absolute value of the given expression. INT (expression) Returns the integer portion of the given expression. SGN (expression) Returns the sign of the given expression. 1, 0, or -1 for posi- tive, zero, or negative. SQR (expression) Returns the square root of the given expression. COMMANDS CLEAR Clears the program from memory and sets all variables to 0. LIST Prints the current program. RENUM Renumber lines in memory. RUN Executes the current program. TROFF Turns off debug tracing. TRON Turns on debug tracing. AUTHORS See https://github.com/tcort/tcbasic/graphs/contributors REPORTING BUGS See https://github.com/tcort/tcbasic/issues COPYRIGHT Copyright (C) 2015, 2016, 2017, 2018, 2020 Thomas Cort <lin- uxgeek@gmail.com> This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. tcbasic 2.3.0 June 2018 TCBASIC(1)
NAME | SYNOPSIS | DESCRIPTION | OPTIONS | STATEMENTS | FUNCTIONS | COMMANDS | AUTHORS | REPORTING BUGS | COPYRIGHT
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