Radio Shack TRS-80 Model 100 Basic Manual page 58

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A line is terminated only when you press (ENTER) and not at the end of a display line.
List the program to confirm that it is:
10 INPUT "AMOUNT OF SALES"; ST
20
IF ST
<=
2000
THEN CM
=
.15
*
ST ELSE CM
=
.20
*
ST
40
PRINT "COMMISSION IS";
45
A$
=
"**$###,###.##"
50
PRINTUSING A$ ; CM
Execute the program.
When prompted for the amount of sales, enter 1000. The commission will be
computed as $150.00, which is a straight 15%.
Run the program again and enter a sales of 3000. This time the commission will be
computed as $600.00 which is a straight 20%.
The IF/THEN/ELSE statement is used to execute one of two different statements
depending upon the logical value of the condition.
If sales are less than or equal to 2000, the commission is calculated as 15% of sales
and control passes to line 40. However, if sales are over 2000, then the statement
following ELSE is executed instead, so that the commission is calculated as 20% of
sales and again control passes to line 40.
The general format of the IF/THEN/ELSE statement is:
IF "condition" THEN "statement ]" ELSE "statement 2"
"statement ]" is executedjf "condition" is true, but "statement 2" is executed
if "condition" is false
In either case, control passes to the next line in the program. The statements executed
can be any valid BASIC statements. Here are some more valid examples of the
IFITHEN/ELSE statement:
100 IF A
=
0 THEN A
=
B
+
1 ELSE A
=
B-1
200 IF A
+
B
<
100 THEN A
=
B ELSE A
=
0
Experiment #6 Computing Commissions for
Several Salesmen
The Commission Sales program, as it currently exists, will compute the commission
for one salesman and terminate. To compute the commissions for several salesmen, it
must be modified.
List the program to confirm that it still looks like this:
10 INPUT "AMOUNT OF SALES"; ST
20
IF ST
<=
2000
THEN CM
=
.15
*
ST ELSE
CM
=
.20
*
ST
40 PRINT "COMMISSION IS";
45
A$
=
H**$###,###.##"
50 PRINTUSING A$ ; CM
52