Error: Invalid Input on my program - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: HP Prime (/forum-5.html) +--- Thread: Error: Invalid Input on my program (/thread-7612.html) Error: Invalid Input on my program - HumbGruland - 01-17-2017 12:39 AM Hello, and thanks for answering, I'm new to the forum so please tell me if this is the wrong sub-forum. I recently got an HP Prime, I can't believe how simple it is programming it, however I encountered a few problems when creating a UI for input. I made a program based on style 2 of: http://www.hpmuseum.org/forum/thread-455.html The code for my program is: Code: ``` EXPORT PuntoFijo() BEGIN  local n,xact,xnue,fx,err,N,f,f1;  N:=100; xnue:=1;  if input(     {f,f1,err,xact},     "Metodo del punto fijo",     {"f(X)=", "f(X)=", "Error=", "x0="},     {       "Ingrese la funcion rodeada por comillas simples",       "Ingrese la funcion depsejada rodeada por comillas simples",       "Ingrese el error maximo",       "Ingrese la raiz aproximada"     },     {f,f1,err,xact}   ) then     F1:=f;     F2:=f1;     M0:={};      M0(n,1):=n;     M0(n,2):=xact;     M0(n,3):=F2(xact);     M0(n,4):=abs(F1(xact));     for n from 2 to N+1 do       xact:=xnue;       xnue:=F2(xact);       fx:=F1(xact);       M0(n,1):=n;       M0(n,2):=xact;       M0(n,3):=xnue;       M0(n,4):=fx;       if abs(fx)