Jump anywhere: Difference between revisions
Added VTL-2
(Added VTL-2) |
|||
Line 2,877:
=={{header|VBScript}}==
In VBScript, there is no <code>goto</code> statement. It is a good thing for structured programming.
=={{header|VTL-2}}==
VTL-2 doesn't do structured programming as such - the only control structure is the <code>goto</code>.<br>
In VTL2, everything is an assignment - including gotos - which are effected by assigning to the system variable <code>#</code>.<br>
The assigned value can be any valid expression - it need not be a constant.<br>
If the expression evaluates to 0, the next statement is executed (or the program stops if there is no next statement).<br>
If the expression evaluates to a line number present in the program, the program continues from that statement.<br>
If the expression does not evaluate to a line number present in the program, the program continues with the next highest line number or stops if there is no line with a number higher that the expression.<br>
The following program demonstrates this - prompiting the user for a label to goto. (In an expression, <code>?</code> indicates a value should be read from the console, assigning to <code>?</code> prints the assigned value)<br>
<lang VTL2>1010 ?="@1010: Where to goto? ";
1020 #=?
1030 ?="@1030"
1040 #=1010
1050 ?="@1050"
1060 #=1010
2000 ?="@2000"
2010 ?="Exiting..."</lang>
{{out}}
<pre>
@1010: Where to goto? 0
@1030
@1010: Where to goto? 1030
@1030
@1010: Where to goto? 1041
@1050
@1010: Where to goto? 1000+50
@1050
@1010: Where to goto? 9999
</pre>
=={{header|Wren}}==
| |||