1. Maple Input and Output

>	p := x^2 + 3*x -9;

>	lprint(p); # same as convert to string

>	printlevel := 5; # prints more information

>	solve(p,x);

2. Exporting Plots

3. Reading and Writing Files

>	printlevel := 1;

>	sols := solve(p,x);

To save the polynomials and the solutions to file, we can use save

>	save p,sols,"H:\\data";

The file "data" on our H drive contains the p and sols as we would type it in in a Maple worksheet.

>	p := 'p'; sols := 'sols'; # clear p and sols

>	read "H:\\data";

With "writeto" and "appendto" we can write everything which appears on screen to a file.  This is mainly useful for running procedures in batch and if we are running Maple in command line mode.

4. Importing and Exporting Data

>	m := matrix(4,3,(i,j) -> 1/(i+j-1));

To save this data in a format useful also to other programs, we can use the writedata.

>	data := map(evalf[20],m); # convert to 20 decimal places

>	writedata(terminal,data,float);

>	writedata("H:\\matrixdata",data,float);

>	data := 'data';

>	data := readdata("H:\\matrixdata",3);

The result of the readdata is already stored as a variable of type listlist;

>	matrix(4,3,data);

5. Low-Level I/O