Sharp MZ-800 - Page 74

ON~GOTO
Format
Explanation
See also
ON <numerical expression> GOTO { <line number> [,<line number>] ...
<label> [,<label>] ...
Abbreviated Format
ON~G,
The ON ~ GOTO statement branches execution to one of the line numbers follow-
ing GOTO, depending on the value of <numeric expression>. The value of
<numeric expression > indicates which of the line numbers following GOTO will
become the branch destination. Therefore, if <numeric expression> is 1, execu-
tion branches to the first line number in the list; if <numeric expression> is 2,
execution branches to the second line number in the list, etc. For example:
100 ON A GOTO 200,300,400,500
Destination when
A is 1 = line 200
A is 2 = line 300
A is 3 = line 400
Ais 4 = line 500
10 INPUT''NUMBER"’;A
20 ON A GOTO 50,60,70
30 GOTO 10
50 PRINT ‘’XXX"" : GOTO 10
60 PRINT “*YYY’ : GOTO 10
70 PRINT ‘’ZZ2Z'' ; GOTO 10
RUN
NUMBER 1
XXX
NUMBER 2
YYY
NUMBER
If a decimal number such as 1.2 is specified, the decimal fraction is truncated be-
fore the statement is evaluated.
Note:
When the value of <numeric expression> in an ON~ GOTO statement is greater
than the number of line numbers specified following GOTO, execution continues
with the next line of the program. This also applies if the value of <numeric
expression > is less than | or negative.
Further, if the value of <numeric expression> is a non-integer, the decimal frac-
tion is truncated to obtain an integer value before the statement is evaluated.
GOTO
ON GOSUB