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**DIM** *#n*\
**DIM** *#n* **TO** [%]*var*

This command returns the size (in characters or bytes) of stream *n*. Whatever applies to the **RETURN #...TO** variant of **POINT #** applies to the **DIM #...TO** as well. Variable *var* stores the size of the stream. As with **RETURN #...TO** above, *var* can be an integer variable in which case the same warning as with the previous section applies.

**GO TO** *#n*, [%]*pos*

This command sets the current position of stream *n* to position *pos*. Let's see how the previous three commands all tie together by experimenting with **browser.cfg**:

```
10 OPEN #4,"/nextzxos/browser
   .cfg"
20 REM "i>" is optional since
   the filename is longer
   than 1 character
30 DIM #4 TO %a: REM Get
   filesize and put it in %a
40 RETURN #4 TO %b: REM Get
   current location and put
   it in %b
50 PRINT "You're in byte: ";
   %b ; " of "; %a
60 GO TO #4, %a/2: REM Move
   to the middle of the file
70 RETURN #4 TO %b: REM Get
   current location and put
   it in %b
80 PRINT "Now, you're in
   byte: "; %b ; " of "; %a
90 CLOSE #4
```

**NEXT** *#n* **TO** [%]*var*

This command gets the next character of input from stream *n.* As with **POINT #** and **DIM #**, if used with the **TO** modifier it also stores it in the variable *var*. If used on the standard **k** channel, this is similar to the **INKEY$** function, except that it always waits for the next character to become available (ie on the **k** channel, it waits for a keypress). Using an integer variable here, is safe as the command gets one character at a time ergo one byte so its value will never exceed **255**.

You can use this command instead of **INPUT #** on all channels that accept input otherwise they're very much identical in function.

Try this little program which will turn your ZX Spectrum Next into a typewriter:

```
10 NEXT #0 TO x
20 PRINT CHR$(x);
30 GO TO 10
```

Alternatively you could change line **10** to: