... the function defined such as DEF FN g(x, y, p, q ...

... ?

Using:

DEF FN w(w$,o$,c)=VAL ... (("FN w(w$,o$,c+1)" ... />
with:

w$(FN w(w$,o$,1))
FN w(w$,o$,1)*100).

... after each parameter in the DEF FN definition. There's code there ...

... nowhere.
[code]
2 DEF FN t$(n,t,d)
+VAL$ (("FN t$("
+STR$ (n-INT ...

... after every parameter of a DEF FN.

By the time ...

... BASIC was at locating the DEF FN when called upon.

[code]
10 DEF FN a()=10
20 PRINT ... :
[code]
10 REM : DEF FN a()=10
20 PRINT ... ROM routine that looks for DEF FN, DATA and (oddly) NEXT appears ...

... the bit that does the copying) work when a$ ... 10 DIM s$(6912): DEF FN p(a)=PEEK a+ ... /> DEF FN l(v)=v-256*FN h(v): DEF FN h ... (v)=INT (v/256):
LET udg=FN ... ,FN l(df),FN h(df),FN l(dl),FN ... DEFADD area (where FN variables are defined) ...

... simple thing:

10 def fn a(x)=x*10
20 print fn a(10)

and ...

... this code:
[code]10 DEF FN f(a,b)=a+b ... , if I change the DEF FN to: DEF FN f(a,b)=a, the ... call.

[code]10 DEF FN f(a,b)=a+b ...
20 DEF FN g(a,b)=a+b ... !
40 PRINT FN f(FN f(2,FN g(3,1)),4 ... !
100 PRINT FN g(FN g(2,FN g(3,1)),4 ...

... avoiding the duplication of copying the data into an array ... "n"

10 DEF FN p(a)=PEEK a+256 ... ):
DEF FN g(v)=v-256*FN h(v): DEF FN h(v ... )=INT (v/256)
11 LET udg=FN ... : READ n$: LET datend=FN p(datadd):
LET ...

... (or both; or neither, if copying directly between two different segments ... .

[code]
10 DEF FN p(a)=PEEK a+256 ... +1):
DEF FN l(v)=v-256*FN h(v): DEF FN h(v ... )=INT (v/256)
20 DEF FN ...

... .org/forums/discussion/33911/copying-a-screen-in-zx- ...

[code]
1 DEF FN p(a)=256*PEEK (a ... REM DPEEK(a)
2 DEF FN m(n,d)=n-d ... /> 3 DEF FN l(v)=v-256*FN h(v): DEF FN h(v ... )
1312 DATA FN l(512),FN h(512)
...

... FOR - POKE - NEXT loop for copying a large chunk of data ... area used by user-defined FN evaluations. I'd often used ... first I tried using a DEF FN to assign the display file ... I could use LET s$=FN s$(), but I got ... was using a user-defined FN by POKEing DEFADD with ...

... both; or neither, if copying directly between two different segments ...
[code]
10 DEF FN p(a)=PEEK a+256 ... br /> DEF FN l(v)=v-256*FN h(v): DEF FN h(v ... )=INT (v/256)
20 DEF FN ... a>127):
DEF FN m$(a$,a,b$, ...

[QUOTE=Battle Bunny;619146]Any DEF FN which has parameters works in ... after passing syntax, so every DEF FN gets treated as having no ... cannot find $CE (which is DEF FN) in the string sometimes). Now ... test it now with simply copying it into your basin R14 ...

... just as well as copying the discrete block, given ... POKE 23660,FN g(dd): POKE 23661,FN h(dd)
----- BASIC version
DEF FN p(a)=PEEK a+256 ... br /> DEF FN g(v)=v-FN h(v)*256: DEF FN h(v ... CODE "$",14,0,FN g(attadd),FN h(attadd),0,2 ...

... list copying each line in turn for processing via a DEF FN string ...

... list copying each line in turn for processing via a DEF FN string ... seemed like putting all the DEF FNs at the very start ...

... shows the BASIC technique for copying from a string to the ... .
[code] 11 DEF FN a(a$)=0: DEF FN p(a)=PEEK a ... v$(20*32): LET da=FN p(23639)+8
13 ... RANDOMIZE FN a("a"(1)): LET pa ... you're doing. You're copying 160 bytes, which you say ...

... now ignored (BadBeard)
Fixed DEF FN statements - not correctly tokenised (Chris ...

... a thing or two regarding Def FN and special pokes etc etc ...

... [/i])
[code]
DEF FN B(b$)=VAL(CHR$ 196 ... [/i])
[code]
DEF FN C$(n)=CHR$ INT (n ... [/b]()
[code]
DEF FN F()=65536-USR 7962
[code]
DEF FN H$(n)=CHR$ (INT (n ... [/i])
[code]
DEF FN L$(l$)=CHR$ (CODE l ...

... /> Fixed Crisis's bug with DEF FN, and colin's problem with ...

Are there any interesting articles or books that explore some of the lesser used BASIC commands/functions e.g. DEF FN, IN, OUT etc?

The Spectrum BASIC manual only glosses over them without going into a lot of detail.

Necros.

... links a bit.
Fixed - DEF FN lines were getting their last ... compatibility meant that REM and DEF FN behaved incorrectly.
Fixed - REM ...

... links a bit.
Fixed - DEF FN lines were getting their last ... compatibility meant that REM and DEF FN behaved incorrectly.
Fixed - REM ...

A while ago Phil demonstrated a nice example of recursiveness in a DEF FN function. Sadly it doesn't appear to be online anymore and I have difficulties finding it out myself: does anyone have a good example? Thx.

... GO TO 20
60 DEF FN M$(IE)=""+M$(IE)+""" is ... evil"
70 PRINT FN M$(IE)
REM etc ...

... : D RANDOMIZE : K : T
DEF FN : E : SYM + 1 READ : E ... + V RUN : K : R
FN : E : SYM + 2 SAVE : K ...

... "Constant e: ";e
210 DEF FN h(e,x)=((e^((2 ... ^((2*x))-1))
220 DEF FN v(a,c,e,g ... *m*g)/(p*a*c)))*FN h(e,(t*(SQR ((g ... =60
240 LET v=FN v(a,c,e,g ...