Language Summary

Here are examples of usage of some of most common commands: (see keypress table for where to find these commands.)

"A MESSAGE"	- displays a message
2->A		- stores the value 2 in the variable A
?->A		- prompts user for input, stores it in variable A
Lbl 1		- labels a place in the program can use Lbl 0-9, A-Z
				(on early models only Lbl 0-9)
Goto 1		- jumps to Lbl 1
Dsz A		- decrements A by 1, skips next statement if A now equals zero
Isz A		- increases A by 1, skips next statement if A now equals zero
A=1=>"HI"	- if A equals 1 then display "HI"
1234_		- pause to display number
		    (also pauses for text, graphs, lines, points, matrices).

Mcl		- puts zero into all variables
Prog 3		- jumps to Prog 3 and returns when Prog 3 ends
Defm 5		- allows extended variable memory to be used.
			(Z[1] up to Z[5] in this case.)
Defm 0		- disables extended memory, freeing up memory for other uses

Graph Y=		- graphs a function of X ( e.g. Graph Y=sin X)
Range 1,2,0,1,2,0	- set viewing parameters for graphs
Cls		- clears the graph screen (so does the Range command)
Plot 2,3		- plot a point at x=2, y=3
Line		- draw a line between the last two points plotted
5!		- factorial of 5
4 nPr 3		- permutations of  3 elements from 4  (not on 7000 models)
4 nCr 3		- combinations of 3 elements from 4 (not on 7000 models)
Ran#		- produce a random number between 0 and 1
P( Q( R( t(	- normal distribution functions (not on models before 7700)
Abs  -2		- absolute value of the number -2
Int  -2.6	- integer part rounded towards zero (this example gives -2)
Intg -2.6	- integer part rounded towards -inf (this example gives -3)
                               (Intg is not available on originals or 7700G)
Frac  5.7	- fractional part of decimal number (this example gives 0.7)
Rnd		- changes internal accuracy to same as defined by FIX or SCI
Pol(X,Y)		- converts rectangular coords to polar,
				stores result in variables I and J
Rec(r, theta)	- converts polar coords to rectangular,
				stores result in variables I and J

Matrix Commands

Matrices Mat A ~ Mat Z can be used.
Results of calculations are stored in Mat Ans.

[[1,2,3][4,5,6]]  - a matrix with 2 rows and three columns,
				first row is [1,2,3], second is [4,5,6]
[[1]]->Mat A	- a one by one matrix is put into matrix A
Mat A+Mat B	- matrix A plus matrix B
Mat A ^-1	- inverse of matrix A (use reciprocal symbol for ^-1)
Det Mat A	- determinant of matrix A
Mat Ans		- the result of the last matrix calculation
Trn Mat A	- transpose of matrix A
Mat A[4,7]	- the entry in the 4th row and 7th column of matrix A
Swap A,2,3	- swap the 2nd and 3rd rows of matrix A
*Row+ 5,A,2,3	- add five times row 2 to row 3 in matrix A

Initialisation And Number Formats

Fix 5		- displays numbers with 5 decimal places. (can use 0-9)
Sci 5		- displays in scientific notation with 5 significant digits
Norm		- switches between norm1 and norm2,
		- norm1 shows small decimals in sci notation 0.001 as 1 E-03
		- norm2 means no special formatting
Eng		- switches  SI units, on or off.

	Scl
	Mcl
	Cls
	Norm