Like this ?

// ===== 1 ======= 2 ======= 3 ======= 4 ======= 5 ======= 6 ======= 7 =

#declare Uiter = 100;
#declare Viter = 100;
#declare Umin = 0.0000001;
#declare Umax = 0.9999999;
#declare Vmin = 0.0000001;
#declare Vmax = 1.9999999;
#declare iU = (Umax - Umin)/Uiter;
#declare iV = (Vmax - Vmin)/Viter;

#declare VV = Vmin;
#while (VV < Vmax)
    #declare UU = Umin;
    #while (UU < Umax)
//      #declare UU = UU + iU;
//      #declare VV = VV + iV;
       #if (UU >= 1 | VV >= 2)
          #debug concat("UU+ =", str(UU, 0, -1), "\n")
          #debug concat("VV+ =", str(VV, 0, -1), "\n")
       #end
//      #declare UU = UU - iU;
//      #declare VV = VV - iV;
       #declare UU = UU + iU;
    #end
    #declare VV = VV + iV;
#end

// ===== 1 ======= 2 ======= 3 ======= 4 ======= 5 ======= 6 ======= 7 =

But I'm not sure if I understand the problem corretly.

-- 
Best regards,

Tor Olav

mailto:tor### [at] hotmailcom
http://hjem.sol.no/t-o-k/tokpicts.html
http://www.crosswinds.net/~tok


ingo wrote:
> 
> How should I rewrite the following to avoid UU & VV to become bigger
> than Umax and Vmax?
> 
> #declare Uiter=100;
> #declare Viter=100;
> #declare Umin=0.0000001;
> #declare Umax=0.9999999;
> #declare Vmin=0.0000001;
> #declare Vmax=1.9999999;
> #declare iU=(Umax-Umin)/Uiter;
> #declare iV=(Vmax-Vmin)/Viter;
> 
> #declare VV=Vmin;
> #while (VV<Vmax)
>    #declare UU=Umin;
>    #while (UU<Umax)
> 
>       #declare UU=UU+iU;
>       #declare VV=VV+iV;
>       #if (UU>=1 | VV>=2)
>          #debug concat("UU+ =",str(UU,0,-1),"\n")
>          #debug concat("VV+ =",str(VV,0,-1),"\n")
>       #end
> 
>       #declare UU=UU-iU;
>       #declare VV=VV-iV;
> 
>       #declare UU=UU+iU;
>    #end
>    #declare VV=VV+iV;
> #end

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