Commodore Plus 4 - Page 70

88 The BASIC Language
LET Abbr. IE
LET variable = expression
Makes a variable equal to a value. The word LET may be (and usually is)
omitted from the command. The LET command is unique in that its main
keyword is optional.
Parameters: variable = value
1. The variable type must match the type of value being assigned (e.g., if the
value is a text string, the variable must be a text-string variable).
If you want to assign more than one variable per line, separate the assignments
with colons.
2. The value can be another variable (X = Y), a calculation (X = X + 10), or a
constant value (X = 18). A variable can be equal to a calculation, including a
formula containing the variable itself and another value.
The value for a variable can change during the program.
Examples: 10 LET X = 4/2*Y Assigns the value 4/2*Y to X.
20 W$ = "NAME" Assigns the text string NAME to N$.
30 X% = X% + A Gives X% the value of the answer to X% + A.
40 A = 4:B = 5 Assigns the value 4 to A and the value 5 to B.
LIST Abbr. II
LIST line number-line number
Displays a copy of a BASIC program or BASIC program lines.
Parameters: line number—line number
Line numbers are optional. If you omit them, the whole program is displayed.
If you want to list just one line, type LIST and the line number. If you want to list
just part of the program, type the first and last lines you want to display.
If you want to list the beginning of the program, type LIST followed by a dash
and the last line number you want to display. If you want to list the end of the
program, type LIST followed by the first line you want to see and then a dash; do
not add any ending line.
Examples: LIST Displays all the lines in the current program.
LIST 20 Displays line 20 from the current program.
LIST -100 Displays the beginning of the program up to line 100.
LIST 50- Displays the program from line 50 on.