Being sure only whole numbers

[jarychk]

I place this code here because it probably does not work, or does not work perfectly, since I have not tried it.


REM want v$ to be positive whole number and may include 0
input v$

if v$=str$(val(v$)) then
    if val(v$)>=0 then
         if val(v$)=int(val(v$)) then
            print "input is valid whole number"
         end if
    end if
   print "input is not what we want"
end if

[B+]

If you did not try it, why post it? For someone else to check for you? OK


do
   input "(Just Enter quits) Enter some stuff to check if whole number > ";v$
   if v$ = "" then
       print "Bye!"
   else
       if v$=str$(val(v$)) then
           if val(v$)>=0 then
               if val(v$)=int(val(v$)) then
                   print "input is valid whole number"
               end if
           end if
           print "input is not what we want"
       end if
   end if
loop until v$ =""


Blah! it is bad!


I tried this:

do
   scan
   print: print "Enter some stuff for me to check if whole number > ";
   n$ = getWholeNumber$()
   if n$ <> "" then print "Your number ";n$;" is OK." else print "Bye!"
loop until n$ = ""

function getWholeNumber$()
   while asc(k$) <> 13 'enter
       scan
       k$ = input$(1)
       if instr("0123456789", k$) then output$ = output$ + k$ : print k$; else beep
   wend
   print
   getWholeNumber$ = output$
end function


[ntech]

Here's some really short code:


Call Main$

Sub Main$
 Input "Enter any number > "; num

 If isNegative(num) Then
   Print "Number is negative."
 Else
   Print "Number is positive."
 End if

 If isWhole(num) Then
   Print "Number is a whole number."
 Else
   Print "Number isn't a whole number."
 End if
End Sub

Function isNegative(number)
 'Returns 1 if the number is negative.
 If instr(str$(number), "-") Then
   isNegative = 1
 Else
   isNegative = 0
 End If
End Function

Function isWhole(number)
 'Returns 1 if the number is a whole number.
 If instr(str$(number), ".") Then
   isWhole = 0
 Else
   isWhole = 1
 End if
End Function