Programming

Program control

changeDir	Changes the working directory within a program.
end	Terminates a program and closes all files.
pause	Pauses for the specified time.
sleep	Sleeps for the specified time.
stop	Stops a program and leaves files open.
system	Quits and returns to the OS.

Flow control

break	Jumps out the bottom of a do or for loop.
continue	Jumps to the top of a do or for loop.
do while, do until	Executes a series of statements in a loop based on a conditional statement.
for	Loops with integer counter.
if, else, elseif, endif	Conditional branching.
wait, waitc	Waits until any key is pressed.

Error handling and debugging

debug	Executes a program under the source level debugger.
error	Creates user-defined error code.
errorlog	Sends an error message to screen and log file.
errorlogat	Sends an error message with the line number of the error report to the screen and log file.
#lineson, #linesoff	Includes or omits line number and file name records from program.
scalerr	Tests for a scalar error code.
trace	Traces program execution for debugging.
trap	Controls trapping of program errors.
trapchk	Examines the trap flag.
warninglog	Prints a warning message to the error window and error log file. The only difference between this and errorlog() is that it will display a warning icon in the error output window.
warninglogat	Prints a warning message to the window and warning log file, along with the file name and line number at which the warning occurred. The only difference between this and errorlogat() is that it will display a warning icon in the error output window

Procedures, keywords and functions

call	Calls function and discards return values.
dynargsCount	Returns the number of dynamic arguments passed into the current procedure.
dynargsGet	Returns specified dynamic arguments with the option to set default values.
dynargsTypes	Returns a vector containing the types of the dynamic arguments passed into the current procedure.
endp	Terminates a procedure definition.
fn	Allows user to create one-line functions.
keyword	Begins the definition of a keyword procedure. Keywords are user-defined functions with local or global variables.
local	Declares variables local to a procedure.
proc	Begins definition of multi-line procedure.
retp	Returns from a procedure.

User input

con	Requests console input, creates matrix.
cons	Requests console input, creates string.
key	Gets the next key from the keyboard buffer. If buffer is empty, returns a 0.
keyav	Checks if keystroke is available.
keyw	Gets the next key from the keyboard buffer. If buffer is empty, waits for a key.

Output

head	Returns the first n rows of a matrix, dataframe or string array.
output	Directs printed output to a file.
print	Prints matrices, arrays, strings and string arrays to the screen and/or auxiliary output.
sprintf	Converts numeric vectors, string vectors and their combinations into formatted strings.
tail	Returns the last n rows of a matrix, dataframe or string array.

General

compile	Compiles a source file to a compiled code file.
run	Runs a program in a text file.