5 REM MAT INPUT EXAMPLE (READ BOTTOM NOTES, PLEASE)
10 DIM A(2,2)
20 DIM B(1,1)
30 DIM C(4)
40 PRINT "INPUT VALUES FOR A(3x3)"
50 MAT INPUT A
60 PRINT "YOU HAVE INPUT";NUM;" VALUES FOR A"
70 PRINT "INPUT VALUES FOR B(2x2) AND VECTOR C(5)"
80 MAT INPUT B,C
85 LET N=NUM
87 IF N<=4 THEN 95
90 PRINT "YOU HAVE INPUT ALL VALUES FOR B AND ";NUM;" VALUES FOR C"
92 GOTO 100
95 PRINT "YOU HAVE INPUT ";N;" VALUES FOR B, AND NONE FOR C"
100 REM LOOK AT LINE 80, WHERE THERE'S A MAT INPUT B,C
110 REM YOU WILL NOTICE THAT N=0 IF YOU INPUT 4 OR LESS VALUES 
120 REM FOR B, AND NONE FOR C; SINCE THE "LAST" MAT INPUT IS FOR C,
130 REM THE "LAST" RETURNED VALUE FOR NUM IS 0; TO AVOID THIS,
140 REM USE ONE MAT INPUT STATEMENT FOR EACH MATRIX/VECTOR YOU HAVE
150 REM TO CHECK NUM FOR, I.E. ONE PER LINE
190 MAT PRINT A,B,C
200 END
