error trap problem

[kanetix]

i'm having a error trap problem with my project

here's the code for the main program:

%Main Program
introduction
loop
loop
mainMenu
if operation < 1 or operation > 7 then
put "invalid input"
else
exit
end if
end loop
if operation = 7 then
exit
end if
loop
userInput
if amount < 1 then
put "invalid input"
else
exit
end if
end loop
display
end loop
goodBye

Problem is, the "invalid input" never shows, instead whenever you try to put operation as <1 or >7 and you press enter it the number just erases ... why?

[AsianSensation]

eh....post up the rest of your code, we don't know the procedures you declared, so post those up as well.

[help_wanted]

k first why do you have 2 loops at once??

[Thuged_Out_G]

2 loops are used to fake a goto line command...heres an example, i didnt understand this at first either lol

loop
main program...like a menu
put "option 1"
put "option 2"
put "option 3"
get selection

loop
if selection=1 then
put "1"
exit %when you exit this loop, it will go back to the beginning of the first loop
end if
end loop
end loop

therefor you can run your program over and over until the user wants to exit