.help goto Feb86 language
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NAME
goto -- branch to a label
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USAGE
.nf
goto label
  .
  .
  .
label: statement

.fi
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PARAMETERS
.ls label
The destination label.  Label names have the same syntax as variable names
and can duplicate the names of existing variables.
.le
.ls statement
The statement executed after the goto statement.  It may be any executable
statement.
.le
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DESCRIPTION
The \fIgoto\fR statement interrupts the normal flow of program execution by
transferring control to the statement following the label.  It may also be
used to exit from nested loops where the break statement is not adequate.
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EXAMPLES
1. The most common use of the \fIgoto\fR statement is to branch to an error
handler if an abnormal condition is detected.

.nf
begin
	for (i=1;  i <= 100;  i += 1)
	    for (j=1;  j <= 100;  j += 1)
		for (k=1;  k <= 100;  k += 1)
		    if (pixel[i,j,k] < 0)
			goto err
		    else
			total += pixel[i,j,k]

	print ("total = ", total)
	return
err:
	print ("Invalid pixel value at ",i,j,k)
end
.fi
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BUGS
No checking is done to see if a jump is made into a loop.
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SEE ALSO
break, next
.endhelp